Class 10 - Gyanora

22 Feb 2026

CLASS 10 Science Chapter- OUR ENVIRONMENT | NOTES

INTRODUCTION: ENVIRONMENT The environment includes everything that surrounds us and has an impact on our lives, whether directly or indirectly. It includes live species like plants, animals, and humans, as well as non-living elements like air, water, soil, sunlight, and temperature. All of these components are interrelated, resulting in a balanced system that supports life on Earth. Humans are an essential part of the ecosystem. However, the ecosystem is suffering as a result of fast population expansion, industrialization, urbanization, and abuse of natural resources. To comprehend these difficulties and discover answers, it is critical to learn the concepts of environment and ecosystems. ECOSYSTEM An ecosystem is a self-sustaining functional unit of nature in which living organisms (plants, animals, and microorganisms) interact with one another and with the non-living components (air, water, soil, light, and temperature) of their environment through energy flow and nutrient cycling. These interactions ensure the flow of energy and the cycling of nutrients, making life possible on Earth. In simple words, an ecosystem includes plants, animals, microorganisms, and their physical environment working together as a system. *DIFFERENCE BETWEEN ENVIRONMENT AND ECOSYSTEM The terms environment and ecosystem are frequently used together, however they do not refer to the same thing. Both are closely similar ideas in the chapter Our Environment, but they have different scopes, structures, and functions. Environment: The environment refers to the entire surroundings in which living organisms exist. It includes all living and non-living components that affect life on Earth. Ecosystem: An ecosystem is a specific functional unit of the environment where living organisms interact with each other and with non-living components through energy flow and nutrient cycling. Basis Environment Ecosystem Meaning Surroundings in which organisms live Functional unit of interaction between living and non-living components Scope Broad and extensive Limited and specific Interaction Interaction may or may not be direct Interaction is always present Structure Includes many ecosystems Part of the environment Focus Overall conditions affecting life Energy flow and nutrient cycling Example Earth, atmosphere Pond, forest, aquarium # Environment is the whole, and ecosystem is a part of it. TYPES OF ECOSYSTEM Based on their origin and characteristics, ecosystems are broadly classified into natural ecosystems and artificial ecosystems. 1. Natural Ecosystem A natural ecosystem is formed by nature without any human intervention. These ecosystems are self-regulating and maintain balance through natural processes such as food chains, energy flow, and nutrient cycling. Natural ecosystems are further divided into terrestrial and aquatic ecosystems. 2. Artificial Ecosystem An artificial ecosystem is created and maintained by humans to fulfill specific needs. These ecosystems depend heavily on human care and management and cannot sustain themselves naturally for a long time. Examples of artificial ecosystems include crop fields, gardens, parks, and aquariums. In a crop field, humans decide which plants to grow, provide water and fertilizers, and control pests. Although artificial ecosystems are productive, they usually have low biodiversity compared to natural ecosystems. TYPES OF ORGANISMS Living species in an ecosystem perform various jobs depending on how they gather energy and nutrients. These organisms are generically classed as producers, consumers, and decomposers. Each species of organism has a distinct purpose, and together they maintain the efficient flow of energy and nutrient recycling in the ecosystem. 1. PRODUCRS Producers are organisms that can produce their own food from simple inorganic substances. They prepare food by photosynthesis, which uses sunlight, carbon dioxide, and water. Because they produce food for themselves and other organisms, they are the base of all ecosystems. Green plants are the most common producers. In aquatic ecosystems, algae and phytoplankton serve as producers. Some bacteria can also produce food using chemical energy, a process known as chemosynthesis. Producers are important because they: 2. CONSUMERS Consumers are organisms that are unable to produce their own food and therefore rely on other organisms for energy. They receive their food either directly from plants or indirectly from animals. Some consumers live on or inside other species and get sustenance from them. Consumers are further segmented according to their feeding habits. a) Herbivores (Primary Consumers): These organisms feed directly on plants. Examples include deer, cow, goat, and rabbit. They form the second level of the food chain. b) Carnivores (Secondary and Tertiary Consumers): Carnivores feed on other animals. Animals like frogs and lizards are secondary consumers, while lions, tigers, and eagles are top consumers. c) Omnivores: Omnivores feed on both plants and animals. Human beings, bears, and crows are common examples. d) Parasites: Parasites are organisms that live on or inside another organism (host) and obtain food from it, usually harming the host. Examples include tapeworms, lice, ticks, and leeches. Parasites are considered consumers because they depend entirely on other organisms for nutrition. Consumers are important because they help in: 3. DECOMPOSERS Decomposers are organisms that break down dead plants, animals, and organic waste into simpler substances. Bacteria and fungi are the main decomposers in an ecosystem. Decomposers are important because: Without decomposers, nutrients would remain locked in dead organisms, and the ecosystem would collapse. FOOD CHAIN All living organisms require food in order to exist, grow, and carry out life activities. However, no organism lives in isolation. Everyone depends on others for food, either directly or indirectly. The transfer of food and energy from one organism to another creates a food chain. A food chain is a linear sequence of organisms through which food and energy pass as one organism eats another. It shows who eats whom in an ecosystem and explains the movement of energy from producers to consumers. In every food chain, energy flows in one direction only, starting from the Sun and ending with top consumers. Example of a Food Chain A common example of a food chain is: Grass → Deer → Lion In this chain: This simple chain shows how energy moves from plants to animals. *Types of Food Chains Food chains can be of different types depending on the source of energy. 1. Grazing Food Chain: This food chain starts with green plants and…

18 Dec 2025

HEREDITY NOTES Class 10 Science (Biology)

HEREDITY Heredity is a biological process through which parents pass their characteristics to their children. Every living organism, whether a plant, animal, or human, inherits traits from its previous generations. It explains why we share similarities with our family — such as facial features, height, voice, or even certain habits. Heredity is controlled by genes, which are tiny units of information present inside our cells. Because of heredity, the continuity of characteristics is maintained in a species, meaning that the next generation shares many common characteristics with the previous one. VARIATION The process of heredity also brings variations, so even though we resemble our parents, we are not exact copies of them. Variation means the differences in traits or characteristics among individuals of the same species. *Importance of Variation Variations are essential because they: TRAITS Traits are the specific characteristics or features of an organism. They decide how an organism looks, behaves, or functions. Each trait is determined by a pair of genes. Examples: Eye colour, height, hair type, skin colour, blood group, etc. *Difference Between Inherited Traits and Acquired Traits Basis Inherited Traits Acquired Traits Meaning Traits that are passed from parents to offspring through genes. Traits that an organism develops during its lifetime due to environment or experience. Cause Caused by genetic information (DNA). Caused by environment, habits, lifestyle, training, etc. Present From Birth Yes, inherited traits are present from birth. No, they develop after birth. Transfer to Next Generation Yes, inherited traits can be passed to offspring. No, acquired traits are not passed to offspring. Examples Eye colour, hair type, height tendency, blood group. Learning to swim, bodybuilding, scars, tanning of skin. Role in Evolution Play a major role in evolution as they are heritable. Play little or no role in evolution because they aren’t inherited. Based On Genes and alleles. Environment and personal experience. Controlled By Genes on chromosomes. External factors and lifestyle. SOME IMPORTANT TERMS DNA DNA stands for Deoxyribonucleic Acid. DNA is the chemical substance present in the nucleus of every cell. It is a double stranded thread like structure. DNA carries all genetic information that decides the traits of an organism. DNA is made up of – Sugar, Phosphate, and Nitrogenous Bases. It passes from one generation to another. Chromatin and Chromosomes When DNA is in scattered form – this structure is called Chromatin. At the time of Cell Division, Chromatin get condensed. This structure of DNA is called Chromosomes. Basis Chromatin Chromosomes Definition Long, thin, thread-like structure made of DNA and proteins. Condensed, thick, rod-like structure formed from chromatin. Appearance Looks like loose threads. Looks like thick rods. Visibility Not visible clearly under a microscope. Clearly visible during cell division. State of Cell Present in non-dividing cells. Present during cell division (mitosis/meiosis). Structure Uncoiled and extended. Highly coiled and condensed. Function Allows gene expression, DNA replication, and packaging. Ensures accurate distribution of DNA to daughter cells. Composition DNA + proteins (histones). Tightly packed chromatin fibres. Genes Genes are present but loosely arranged. Genes are arranged in a fixed order along chromosome arms. *Chromosome Number – Chromosome number helps in maintaining genetic stability across generations. – Humans have 46 chromosomes (arranged in 23 pairs) – Out of these: – All Cells of Human body are Diploid except Gametes. – Gametes (sperm cell and egg cell) are Haploid Cells. HAPLOID AND DIPLOID A living organism’s cells have a set number of chromosomes. This number determines whether a cell is haploid (n) or diploid (2n). *Haploid *Diploid GENES A gene is a unit of heredity composed of DNA that regulates the expression of a specific trait in an organism. Genes are hereditary units on chromosomes that contain coded information (DNA instructions) for protein production, which determines an organism’s traits and characteristics. In simple words, Genes are small segments of DNA that carry information for a specific trait and are passed from parents to their children. A gene is basically a set of instructions that tells the body how to acquire a particular trait (such as eye color, height, hair type, and so on). Genes are found inside the nucleus of every cell and sit on chromosomes in a fixed, specific position called a locus. Humans have 20,000 to 25,000 genes approximately. These are spread across 23 pairs of chromosomes. ALLELES In genetics, every trait in our body is controlled by two types of a gene called alleles—one inherited from the mother and the other from the father. Allele is an alternative version or form of a gene. These are different variants of a gene that share the same location (locus) on homologous chromosomes. They are paired versions of a gene inherited from parents, with each allele carrying slightly different information, resulting in the formation of distinct features such as eye color, height, or hair type. We have alleles because we inherit one chromosome from our mother and one from our father, and the genes on them are also paired. Genes are the traits, whereas Alleles are Variations of the trait. Difference Between Genes and Alleles Basis Genes Alleles Meaning A gene is a unit of heredity that controls a specific trait. Alleles are different forms or versions of the same gene. Role Determines a particular character (like eye colour). Determines the different expressions of that character (brown/blue eyes). Count Each trait has one gene. Each gene exists in two allelic forms (one from each parent). Location Found at a fixed position on chromosomes. Found at the same position (locus) on homologous chromosomes. Examples Gene for eye colour, gene for height. B & b (brown and blue eye alleles), T & t (tall and short alleles). Nature General information-carrying unit. Specific variations of that information. Function Controls basic development of traits. Controls which form of the trait will be expressed. Dominant Allele Dominant Allele is the stronger one from the two Alleles. It is the stronger form of a gene that expresses its trait even if only one copy is present. It is always written…

12 Dec 2025

Outcomes of Democracy NOTES Class 10 Civics

INTRO – OUTCOMES OF DEMOCRACY Democracy is not just a term; it is a promise. A promise of liberty, equality, and a government that is responsive to its citizens. Democracy is widely regarded as the most trustworthy form of government. But have you ever thought why we have such high expectations from it? HOW DO WE ASSESS OUTCOMES OF DEMOCRACY Assessing democracy is like checking the “report card” of a country. We know that democracy is popular over the world, but to determine whether it is actually successful, we must look at how it works in reality rather than just what it promises. 1. Democracy is judged by its actual performance 2. People have different expectations from democracy 3. Democracy must be assessed collectively, not individually 4. Democracy involves a long and complex decision-making process 5. We need proper criteria to judge democracy 6. Democracy allows room for correction ACCOUNTABLE, RESPONSIVE, AND LEGITIMATE GOVERNMENT One of the most important outcomes of democracy is that it aims to create a government that is accountable, responsive, and legitimate. *Democracy Ensures an Accountable Government *Democracy Works as a Responsive Government *Democracy Provides a Legitimate Government ————————————————————————————————– *Case Study from NCERT: Transparency The cartoon shows a very large telescope pointed from the government’s side towards the public. “A strong democracy requires transparency—citizens should know as much about the government as the government knows about them.” This cartoon perfectly explains an important idea from the chapter “Outcomes of Democracy”—that in a democracy, the government must be open, transparent, and answerable to the people. However, the cartoon shows the opposite situation. – On the left, the government is using a big, powerful telescope to watch the public. – On the right, the public is trying to look at the government through a tiny lens. The cartoon shows that transparency is weak, making accountability weaker too.If people cannot see what the government is doing, they cannot question it—this goes against democratic values. ——————————————————————————————- ECONOMIC GROWTH AND DEVELOPMENT IN DEMOCRACY From 1950 to 2000, economic growth in many democracies faced ups and downs. In Contrast, several Dictatorships show high economic growth during this period, due to centralized decision-making and control over resources. Democracy does not guarantee the fastest growth, but it ensures more stable and secure growth. Even if growth is not very high, democracy provides: —————————————————————————————— *CASE STUDY ON ECONOMIC GAIN AND INCOME DISTRIBUTION GAIN 2000-2006 “The cartoon shows that economic growth made the rich stronger, while the middle class gained little and the poor gained almost nothing.” Strong upper body = Rich peopleThe rich have become stronger and richer. They gained the most from economic growth. Thin middle body = Middle classThe middle class got some benefits, but not much. Their income didn’t increase very significantly. Weak legs = Poor peopleThe poor remain weak. They hardly got any benefit from growth. -The cartoon highlights unequal distribution of economic growth: -This problem is called income inequality. ——————————————————————————– REDUCTION OF INEQUALITY AND POVERTY Democracy aims not only to grant citizens the right to vote, but also to ensure that everyone has equal possibilities in life. One of the most important effects of democracy is an effort to minimize inequality and poverty, which makes society more just and equitable. INEQUALITY: Inequality refers to the unequal distribution of wealth, resources, and opportunities among individuals. For example, some individuals have access to better education, jobs, and opportunities than others. POVERTY: Poverty is defined as a lack of resources to meet basic human requirements such as food, health, education, and housing. The poor frequently have limited options to earn and improve their life. *How Democracy Works to Reduce Inequality Democracy promotes not just political equality, but also social and economic equality. (a) Equal Rights for All (b) Policies to Support Weaker Sections (c) Government Accountability (d) Welfare Programs (e) Employment Opportunities Programs that create jobs for those with low income, such as – Rural employment schemes, Skill development programs, and Support for small businesses and self-employment (f) Access to Basic Services —————————————————————————————- *Case Study on – “Voice of the Poor” The image shows a poor person standing still in worn-out, patched clothing. This cartoon shows a basic drawback of democracy – even though democracies promise equality and justice, poor people are sometimes sidelined. – The cartoon suggests that: ————————————————————————————— *Case Study on – “World’s Wealth Owned by a Few” This powerful illustration highlights one of the major challenges democracies face—economic inequality. The graphic provides a remarkable visual of how wealth is distributed unequally around the world. The cartoon shows an extremely wealthy man taking over half of the world’s wealth, while a much smaller and weaker individual receives only a small share. This cartoon shows: From this, We can conclude that economic inequality can create dissatisfaction and weaken democratic values if not addressed. ———————————————————————————— ACCOMMODATION OF SOCIAL DIVERSITY Social diversity refers to the different social groups that exist in a society based on religion, language, caste, culture, geography, or ethnicity. One of democracy’s greatest strengths is its ability to recognize social differences and establish a framework in which diverse groups can coexist peacefully. Rather than imposing “one uniform culture,” democracy seeks to accommodate many communities. *Features of Accommodation in a Democracy 1. Majority Rule Cannot Mean Rule by One Community 2. Democracy Encourages Mutual Respect 3. Power Sharing Helps Reduce Conflicts 4. Diversity is Seen as a Strength, not a Problem DIGNITY AND FREEDOM OF CITIZENS Dignity means self-respect, feeling appreciated, and being regarded as an equal human being. Democracy provides dignity by guaranteeing that every person is valued, regardless of caste, religion, gender, or economic status. Dignity is important because – it allows people to live with respect, protects individuals from humiliation and discrimination, and gives citizens the confidence to participate in public life freely. There are the following ways by which democracy Protects Dignity & Freedom: 1. Equality Before the Law 2. Fundamental Rights Guarantee Freedom 3. Government is Accountable to the People 4. Protection of Minority Rights 5. Freedom to Raise…

21 Nov 2025

CLASS 9 CIVICS Chapter-4 Working of Institutions | NOTES

INTRO – WORKING OF INSTITUTIONS Institutions are systems or structures that help the government work properly.They are like the engine parts of a big machine called government. Institutions keep our democracy organized, smooth, and trustworthy. This chapter explains – how one major government decision moves through different institutions — from making it, approving it, to checking it. It helps us see democracy in action, not just on paper. OFFICE MEMORANDUM An Office Memorandum (O.M.) is a formal government document.It contains orders, instructions, or decisions issued by the Government of India. It is written in an official format and carries the authority of the Government of India. The famous office memorandum was issued on 13 August 1990. *MANDAL COMMISSION -The Mandal Commission was a government-appointed committee created to find out: -It is officially known as ‘Second Backward Classes Commission’ –Year of formation: 1979 –Formed by: Prime Minister Morarji Desai –Chairperson: B.P. Mandal -After studying thousands of villages, towns, and communities, the Commission concluded: -The Mandal Commission recommended the 27% reservation for Socially and Economically Backward Classes (SEBC) in central government jobs and public sector services. -For almost 10 years, the recommendations were not applied. -Finally in 1990, Prime Minister V.P. Singh decided to implement 27% reservation for OBCs. This decision was officially announced in the famous Office Memorandum (13 August 1990) -The reservation decision was challenged in the Supreme Court. This case was known as the ‘Indira Sawhney and others Vs Union of India case’. –In the Indra Sawhney Case (1992), the Supreme Court: This balanced both social justice and merit. DECISION MAKERS In a democracy like India, no single person takes decisions alone.Every major government decision goes through a chain of important people and institutions. This “team” of decision makers includes: NEED FOR POLITICAL INSTITUTIONS Political institutions are the building blocks of our government. They help the country run in an organized, fair, and efficient way. They are like the engine that drives the whole system of democracy. There are some reasons on why are political institutions Necessary: 1. To Take Decisions for the Country Important issues like education, health, defence, budget, and welfare schemes need proper decision-making.Political institutions help decide what should be done for the nation. 2. To Implement Those Decisions Decisions become meaningful only when they are put into action.Institutions like ministries and civil servants implement government policies on the ground. 3. To Resolve Disputes and Maintain Peace Courts and other institutions settle conflicts between – People, States, and Government bodies. This keeps society calm, fair, and orderly. 4. To Make Democracy Function Smoothly Democracy needs rules, procedures, and transparency.Institutions prevent misuse of power and ensure that leaders remain accountable. 5. To Distribute Power Fairly No single person runs the whole country. Power is divided among – Parliament (law-making), Executive (implementation), and Judiciary (interpretation). This protects freedom and prevents dictatorship. PARLIAMENT Parliament is the heart of Indian democracy. It is where laws are made, the government is challenged, and citizens’ opinions are heard. It acts as the bridge between the government and the people.If India were a machine, Parliament would be the control room. *Functions of Parliament Following are the main Functions of Parliament: 1. Law Making Parliament makes laws on national issues like education, environment, defence, technology, etc. 2. Controlling the Government Parliament checks whether the government is working properly or not through – Question Hour, Debates, Motions, and No-Confidence Motion. 3. Representing the People Members speak on behalf of their states and constituencies.Parliament reflects the voice of India. 4. Approving the Budget Government cannot spend money without Parliament’s approval.This keeps expenses transparent and accountable. 5. Discussing National Issues Inflation, unemployment, safety, defence, floods — Parliament discusses everything that matters to citizens. *The Two Houses of Parliament Basis of Difference Lok Sabha (House of the People) Rajya Sabha (Council of States) Meaning Lower house of Parliament; represents the people of India Upper house of Parliament; represents the states and union territories Members Maximum 552 members Maximum 250 members Election Method Members are directly elected by the people Members are indirectly elected by State Legislative Assemblies; some nominated by President Term 5 years (unless dissolved earlier) Permanent House; not dissolved. 1/3rd members retire every 2 years Presiding Officer Speaker of Lok Sabha Chairman (Vice-President of India) Representation Represents the population of India Represents the states of India Powers in Money Matters Has more power; Money Bill can only be introduced in Lok Sabha Has limited power; cannot reject a Money Bill, only suggest changes Control over Government Can remove the government through a No-Confidence Motion Cannot pass a No-Confidence Motion Age Requirement Minimum age: 25 years Minimum age: 30 years Role in Law Making More powerful; final say in most matters Cannot overrule Lok Sabha in joint sessions Dissolution Can be dissolved Cannot be dissolved (permanent house) *Why Lok Sabha Is More Powerful The following are the points that show how Lok Sabha is more powerful than Rajya Sabha: 1. Lok Sabha Represents the People Directly Members of Lok Sabha are directly elected by citizens. This makes Lok Sabha the true voice of the people. Rajya Sabha represents states, not people directly. So in matters related to public interest, Lok Sabha has a stronger role. 2. Lok Sabha Controls the Government The Council of Ministers (including the Prime Minister) is responsible only to the Lok Sabha. 3. More Power in Money Matters Money Bills deal with government spending, taxes, budget, etc. According to the Constitution: 4. Joint Sessions Favor Lok Sabha If both houses disagree on a law, a joint session is called.In a joint session, the number of Lok Sabha members is much larger than Rajya Sabha. It will Results that Lok Sabha’s opinion almost always wins. 5. Lok Sabha Can Be Dissolved, Rajya Sabha Cannot Lok Sabha’s term is 5 years. It keeps Lok Sabha directly answerable to the people, giving it more democratic power. Rajya Sabha is permanent and cannot be dissolved. POLITICAL EXECUTIVE Every country needs people who take decisions and others…

8 Nov 2025

CLASS 10 GEOGRAPHY Ch- Manufacturing Industries | NOTES

INTRO- MANUFACTURING The term “Manufacturing” comes from two Latin words- ‘Manu’ means hand and ‘facture’ means to make. It means producing goods in large quantities from raw materials and adding value to them through processing, machinery, and labour. It is a secondary activity because it converts primary materials (from agriculture, mining, etc.) into finished products. *Relation Between Agriculture and Industry Agriculture and industry are interdependent: #Both sectors support each other’s growth and sustainability. IMPORTANCE OF MANUFACTURING Manufacturing plays a vital role in the economic and social development of a nation. CONTRIBUTION OF MANUFACTURING TO NATIONAL ECONOMY INDUSTRIAL LOCATION Industrial location refers to the specific place or area where an industry is set up. Industries tend to locate where all necessary inputs are easily and cheaply available. According to Alfred Weber’s Industrial Location Theory, “An industry is located at a place where the cost of production and transportation is minimum.” *Factors Affecting the Location of Industries Industries do not grow everywhere — they develop where conditions are favourable.The major factors are given below. 1. Availability of Raw Materials 2. Labour (Manpower) 3. Power (Energy Source) 4. Capital (Investment) 5. Market 6. Transport and Communication 7. Government Policies 8. Industrial Climate (Social and Political Stability) *Industrial Clusters or Agglomeration -When several industries are set up close to each other for mutual benefit, it is called industrial agglomeration. -These areas become industrial hubs or regions. -Example: CLASSIFICATION OF INDUSTRIES Industries can be classified or grouped on different bases such as raw materials, capital investment, ownership, and size.This helps in understanding their nature, functioning, and contribution to the economy. AGRO-BASED INDUSTRIES Agro-based industries are industries that use agricultural products as raw materials. They form a strong link between agriculture and industry, and are the largest group of industries in India. These industries process agricultural raw materials into finished or semi-finished goods that can be used by consumers or other industries. 1. Textile Industry 2. Cotton Textile Industry 3. Jute Industry 4. Sugar Industry MINERAL BASED INDUSTRIES 1. Iron and Steel Industry 2. Aluminium Smelting 3. Chemical Industries 4. Fertiliser Industry 5. Cement Industry 6. Automobile Industry 7. Information Technology and Electronics Industry INDUSTRIAL POLLUTION AND ENVIRONMENTAL DEGRADATION Industrial pollution refers to the contamination of the environment due to harmful by-products released from industries into air, water, and soil. Industries are responsible for four types of pollution: Air, Water, Land, Noise *Measures to Control Industrial Pollution To reduce pollution and promote sustainable development, the following steps are essential:

7 Nov 2025

CLASS 10 SCIENCE Chapter- How do Organism Reproduce | NOTES

INTRODUCTION– Reproduction Reproduction is the biological process by which new individuals (offspring) are produced from their parents. It ensures the continuity of life on Earth. Reproduction is a life process, but not essential for survival of an individual — it is essential for the survival of species. DNA (Deoxyribonucleic Acid), present in the nucleus of every cell, is the hereditary molecule that carries genetic information, gets copied during reproduction, and ensures continuity and variation in organisms. TYPES OF REPRODUCTION 1. ASEXUAL REPRODUCTION Asexual reproduction is the type of reproduction in which only one parent is involved and no fusion of gametes takes place.The offspring produced are genetically identical to the parent, i.e., they are exact copies or clones of the parent. *Characteristics of Asexual Reproduction *Advantages of Asexual Reproduction: *Disadvantages of Asexual Reproduction: 2. SEXUAL REPRODUCTION Sexual reproduction is the type of reproduction in which two parents (male and female) are involved and fusion of male and female gametes occurs to form a zygote, which develops into a new organism.The offspring produced show variations because they inherit genetic material from both parents. *Characteristics of Sexual Reproduction: *Advantages of Sexual Reproduction: *Disadvantages of Sexual Reproduction: METHODS OF ASEXUAL REPRODUCTION 1. FISSION In this process, a unicellular organism divides into two or more new individuals. -There are two types of Fission: Binary Fission and Multiple Fission. i. Binary Fission: The parent cell divides into two equal halves. For example: Amoeba ii. Multiple Fission: The parent cell divides into many daughter cells. It usually occurs in unfavourable conditions. For example: Plasmodium (malaria parasite) 2. BUDDING In this method, a small outgrowth (bud) develops on the parent’s body, which grows and later detaches to form a new individual. For Example: Yeast and Hydra 3. FRAGMENTATION In this process, the body of the parent organism breaks into two or more fragments, and each fragment grows into a new organism. It Occurs only in simple multicellular organisms with simple body organization, not seen in complex animals or plants. For Example: Spirogyra (algae) 4. REGENERATION The ability of an organism to regrow lost body parts, and sometimes a whole new organism can be formed from a body fragment. Regeneration occurs through specialized cells that divide and differentiate into new tissues. For Example: Planaria, and Starfish 5. SPORE FORMATION It is a method of asexual reproduction in which the parent produces tiny spherical spores inside a sporangium (spore case).When the sporangium bursts, the spores spread and grow into new organisms under suitable conditions. For Example: Rhizopus (Bread Mould) 6. VEGETATIVE PROPAGATION (in plants) It is the asexual reproduction in plants where new plants are produced from vegetative parts like root, stem, leaf, or bud, instead of seeds. SEXUAL REPRODUCTION Sexual reproduction is the type of reproduction in which two parents are involved, and fusion of male and female gametes occurs to form a zygote, which later develops into a new individual. –Sexual reproduction is the most common mode of reproduction in higher plants and animals. -It involves two parents — one male and one female. -This process leads to the formation of genetically different offspring due to fusion of gametes and mixing of genetic material. -It helps in variation, evolution, and survival of species. SEXUAL REPRODUCTION IN PLANTS Sexual reproduction in plants involves the fusion of male and female gametes, resulting in the formation of a zygote, which grows into a seed and later forms a new plant. This process ensures variation and continuity of species. -Reproductive Organ of the Plant: *Structure of Male and Female Reproductive Parts 1. Male Part – Stamen It consists of: 2. Female Part – Carpel / Pistil It consists of: *Steps involved in sexual reproduction in plants The process occurs in four main stages: STEP 1: POLLINATION Pollination is the process of transferring pollen grains from the anther (male part) to the stigma (female part) of a flower. – Types of Pollination: – Agents of Pollination: Pollination is carried out by wind, water, insects, or birds.(Bees and butterflies are the most common pollinators) STEP 2: FERTILIZATION STEP 3: FRUIT AND SEED FORMATION After fertilization, many changes take place inside the flower: STEP 4: GERMINATION When the seed falls on the soil and gets favourable conditions like air, water, and warmth — it germinates.The embryo inside the seed starts growing into a new plant, completing the life cycle. SEXUAL REPRODUCTION IN HUMAN BEING Reproduction in human beings is a sexual mode of reproduction, involving two parents — a male and a female. It ensures the continuity of human life and the transfer of genetic information from parents to offspring. This process involves the formation of gametes, their fusion (fertilization), and the development of a new individual from the zygote. *PUBERTY -Puberty is the stage when the body becomes capable of reproduction. -It is controlled by hormones and marks physical, physiological, and emotional changes. -Generally occurs between: -Changes at Puberty in Males: – Changes at Puberty in Females: *MALE REPRODUCTIVE SYSTEM The male reproductive system is responsible for the production, storage, and delivery of sperms (male gametes). It also produces the male sex hormone – Testosterone, which controls the development of male features and reproduction. -Testes (singular: Testis): -Vas Deferens (Sperm Duct): -Urethra: -Penis: *FEMALE REPRODUCTIVE SYSTEM The female reproductive system is designed to produce female gametes (ova or eggs), receive sperms from the male, and provide a safe environment for fertilization and development of the baby.It also produces female hormones that control reproductive cycles and secondary sexual characteristics. -Ovaries -Oviducts (Fallopian Tubes) -Uterus (Womb) –Cervix -Vagina *FERTILIZATION OF EGG Fertilisation is the process in which the male gamete (sperm) fuses with the female gamete (egg or ovum) to form a zygote, which is the first cell of a new individual. In humans, fertilisation occurs in the fallopian tube (oviduct) of the female reproductive system. There are two Types of Fertilization: #Humans show internal fertilisation, i.e., fertilisation takes place inside the female body. -Process of Fertilisation: -When the Egg is Fertilised -When the…

5 Nov 2025

CLASS 10 ECONOMICS Chapter- GLOBALIZATION AND INDIAN ECONOMY | NOTES

INTRO- GLOBALIZATION Globalization means the process of integration or interconnection between countries through the movement of goods, services, people, capital (money), and information. In simple terms, it is the process that turns the world into one large market — where countries are connected economically and culturally. “Globalization is the process by which the world’s economies, societies, and cultures are becoming interconnected through increased cross-border trade, investment, and communication.” Globalization has grown to include far more than just trade. This includes: Multinational Corporations (MNCs) are the main driving force behind globalization. MNCs play a central role in connecting national economies and spreading globalization. MULTINATIONAL CORPORATIONS (MNCs) An MNC is a company that owns or controls production and business operations in more than one country. It is also known as Transnational Corporation. *Aims / Objectives of MNCs *Role of MNCs in Globalization *Benefits from MNCs to Local Companies Benefits Explanation / Example 1. Capital Investment MNCs bring foreign money that helps local companies expand business and production. 2. Transfer of Technology Local firms get access to advanced machines and modern production methods. 3. Better Skills and Standards Workers and managers learn new techniques and improve quality of work. 4. Increased Demand for Local Goods MNCs buy raw materials and parts from local suppliers, creating new business. 5. New Business Opportunities Local small businesses grow as suppliers, transporters, or service providers. 6. Access to Global Markets Collaboration with MNCs helps local firms export goods and enter global trade. 7. Improved Competitiveness Local companies upgrade quality and efficiency to compete globally. IMPACT OF GLOBALIZATION Positive Impacts Negative Impacts 1. More foreign investment 1. Unequal benefits 2. Expanded markets 2. Loss to small industries 3. Advanced technology 3. Job insecurity 4. More employment 4. Environmental damage 5. Growth of Indian companies 5. Cultural erosion 6. Better quality & lower prices 6. Rural sector left behind 7. Global exchange of ideas 7. Economic dependence FACTORS THAT ENABLED GLOBALIZATION 1. Rapid Improvement in Technology 2. Liberalization of Foreign Trade and Investment Policy 3. Role of Multinational Companies (MNCs) 4. Growth of Communication Networks 5. Development of Global Financial Systems 6. Trade Agreements and International Organizations 7. Political and Economic Reforms in Developing Countries NEW ECONOMIC POLICY 1991 It was Introduced in 1991 by the government of India under Prime Minister P. V. Narasimha Rao and Finance Minister Dr. Manmohan Singh. The New Economic Policy of 1991 marked a major turning point in India’s economic history. It shifted India from a closed and controlled economy to an open and market-oriented economy. Reason: India faced a serious economic crisis – low foreign exchange, high inflation, and high debt. The main feature of NEP 1991 was LPG policy – Liberalization, Privatization, Globalization.

8 Oct 2025

CLASS 10 CIVICS Chapter-4 POLITICAL PARTIES | NOTES

MEANING OF POLITICAL PARTIES A political party is an organised group of people with shared political views and ideologies who join together to contest elections and maintain power in government. They agree on certain policies and programmes aimed at increasing societal well-being. Why Do We Need Political Parties? 1. Democracy Cannot Function Without Them If there are no parties, no one will be responsible for how the country is run. And government will become unstable and directionless. 2. They Represent Different Opinions Parties make sure that they will represent society’s diverse views, interest, and opinion. 3. They Make Policies and Run Government Ruling party makes laws and policies for the country. Whereas, Opposition checks and criticises the ruling party. This will ensure the accountability. 4. They Provide Choices to Voters Political parties provide citizens with different options of leaders, programmes and policies. 5. They Form a Link Between Government and People We need Political Parties as they act like a bridge between government and citizens by raising demands and problems of the people. COMPONENTS OF POLITICAL PARTIES A political party is not just its leaders but a combination of leaders + active members + followers. All three components are necessary for the functioning and success of a party. Functions of Political Parties 1. Contest ElectionsParties nominate and campaign for candidates to win elections and implement programs. 2. Create policies and programmesEach party develops policies and programs to address public issues, providing voters with clear options for the country’s future direction. 3. Making LawsParties in power shape policies that reflects their ideology and promises. 4. Establish and Run GovernmentThe majority party (or coalition) establishes the government, manages ministries, and implements policies, while the opposition checks its actions. 5. Shape Public OpinionParties employ rallies, campaigns, debates, and media to influence and guide people on important national and social issues. 6. Give people access to the governmentParties serve as bridges between the government and citizens, fighting for their needs and facilitating access to government programs and services. Types of Party System A party system refers to how political parties are organised and run in a country, including how many parties compete, share power, and influence policies. Political scientists divide party systems into three categories based on the number of parties and the nature of competition: 1. One-Party System -Definition: A system where only one political party exists or dominates all levels of government. -Features: -Examples: China (Communist Party), North Korea (Workers’ Party). -Pros: Ensures stability -Cons: limits freedom of choice and disagreement. 2. Two-Party System -Definition: A system where two major parties dominate national politics. -Features: -Examples: USA (Democrats & Republicans), UK (Conservatives & Labour). -Pros: Gives political stability and clear policies, limits fragmentation of votes. -Cons: Minorities and smaller groups may be underrepresented. 3. Multi-Party System -Definition: A system where multiple political parties compete for power at national and state levels. -Features: -Examples: India, Italy, Israel. -Pros: -Cons: Can lead to unstable governments if coalitions are weak or short-lived. Types of Political Parties Political parties can be classified based on their scope of influence and operation in a country. In India and most democracies, they are mainly of two kinds: *National Party -A national party is a political party that runs in several states and has a large national following. If these parties secure a majority of seats in the Lok Sabha, they will be able to form the central government. These political parties are referred to as “recognised political parties” because the Election Commission of India (ECI) has recognised them. –Criteria for a National Party A political party is recognised as a National Party in India if it has a widespread presence across the country. According to the Election Commission of India, a party can be recognised as a national party if it fulfil any one of the following: OR OR –National Parties in India (2024–25) 1. Bharatiya Janata Party (BJP) 2. Indian National Congress (INC) 3. Bahujan Samaj Party (BSP) 4. Communist Party of India (Marxist) – CPI(M) 5. Aam Aadmi Party (AAP) 6. National People’s Party (NPP) *State/Regional Party A state party, sometimes known as a regional party, is a type of political party that is only accepted in one or a small number of Indian states. These parties primarily serve the interests of their respective states or regions, but through alliances, they can also have a significant impact on national politics. Examples of State Parties in India POLITICAL ALLIANCES When two or more political parties join together to run for election and form a government, this is known as a political alliance. If they win, they agree to share power and work together on a single program. -Examples of Alliances in India -Need for Alliances ROLE OF OPPOSITION The party or parties that do not control the government but are well-represented in the legislature are known as the opposition parties. The Leader of the Opposition is the major party that is not in power; it is officially recognised if it holds at least 10% of the seats in the Lok Sabha. Functions / Importance of Opposition SIGNIFICANCE OF POLITICAL PARTIES IN DEMOCRACY Political parties are called the “backbone of democracy” because without them democracy cannot function. So, their Significance/Importance in Democracy are as follow: POLITICAL PARTY REFORM Political parties are very important in a democracy because they run governments, represent people, and give choices in elections. But sometimes, parties face problems like corruption, family rule, and misuse of money. That is why political party reforms are needed. *Why Do We Need Political Party Reforms? Political parties need reforms because: *How Can Political Parties Be Reformed? 1. Legal Reforms (By Law) 2. Institutional Reforms (By Election Commission & Constitution) 3. Voluntary / Social Reforms (By People & Parties) *Some suggestions to reform political parties CHALLENGES TO POLITICAL PARIES 1. Dynastic Succession: 2. Money and Muscle Power: 3. Lack of Internal Democracy: 4. Influence of Rich and Powerful Groups: 5. Corruption and Declining Credibility: 6. Fragmentation of Votes: 7. Frequent Splits in Parties: 8.…

27 Sep 2025

CLASS 10 Science | Chapter- HUMAN EYE and Colourful World | NOTES

INTRODUCTION: HUMAN EYE -The human eye is a sensory organ that allows us to see objects around us. -It operates like a camera, forming an image of an item on the retina. -The retina is the eye’s light-sensitive screen, where images are created. -The image created is real, inverted, and smaller in size; but our brain interprets it as upright. -The eye lens is convex in shape, and the focus length may be changed to observe both nearby and distant things. -The average adult human eye has a focus length of around 2 cm and a diameter of approximately 2.3 cm. -The human eye can see objects clearly from around 25 cm (near point) to infinity (far point). Check out related Question-Answers: Visit QnA.Gyanora.in or PARTS OF HUMAN EYE Cornea Iris Pupil Eye Lens Retina Ciliary Muscles Optic Nerve Aqueous Humour Vitreous Humour Check out related Question-Answers: Visit QnA.Gyanora.in or HUMAN EYE WORK AS A CAMERA The human eye works like a camera in many ways, like: 1.The Lens of the Eye: Just as a camera lens focusses light, your cornea and eye lens bend light rays to create a sharp image inside. 2. The Aperture: The aperture in a camera determines how much light enters. The pupil in your eye performs this function. The pupil contracts in bright sunshine and expands in low light. 3. The shutter: Cameras employ shutters to open and close. Your eyelids act as natural shutters, shielding your eyes and providing slumber. 4. The Film or Screen: Camera capture images on a film or sensor. Your eye contains a retina, a particular light-sensitive screen that collects images. 5. The Focus System: In cameras, we can adjust the focus manually or automatically. The ciliary muscles in your eyes do this instantly. They change the lens to allow you to view both your book and the stars. 6. The Brain as a Memory Card: Just like a camera stores photographs on a memory card, your optic nerve transports image information to the brain, where they are stored and processed. Check out related Question-Answers: Visit QnA.Gyanora.in or NEAR POINT OR LEAST DISTANCE OF DISTINCT VISION -The near point of the human eye is the shortest distance at which an item can be clearly perceived without effort. -It is also known as the minimum distance of clear eyesight. -The near point for a normal healthy adult is about 25 cm away. -Objects closer than 25 cm appear blurred because the eye lens is unable to correctly focus light on the retina. -At the nearest point: -Symbolically, D = 25 cm. *Accommodation of the Eye: Check out related Question-Answers: Visit QnA.Gyanora.in or DEFECT OF VISION AND CORRECTION 1.MYOPIA (Near Sightedness) –Myopia, also referred to as near sightedness, is a vision condition in which a person is able to see nearby object but distant objects appear blurry. –The eye lens focusses light in front of the retina rather than onto it. –causes: It happens because of: -Correction: 2.HYPERMETROPIA (Far Sightedness) -Hypermetropia, also referred to as far sightedness, is an eye disorder that causes a person to view far objects clearly but near objects to appear blurry. -The eye lens directs light behind the retina rather than onto it. -Causes: It happens because of: –Correction: 3.PRESBYOPIA –Presbyopia is an age-related vision condition in which the eye loses the capacity to focus on nearby objects. -Cause: -Symptoms: -Correction: Check out related Question-Answers: Visit QnA.Gyanora.in or ADVANTAGES OF THE EYE IN FRONT OF THE FACE 1. Binocular vision: 2. Improved Depth Perception: 3. Wide Range of Vision: 4. Protection and coordination: REFRACTION THROUGH A PRISM *What is a Prism? *Refraction through a Prism *Angle of Deviation (δ) DISPERSION OF WHITE LIGHT -The process by which white light breaks into its individual colours as it travels through a prism or any other refracting material is known as dispersion. -The spectrum’s seven colours are VIBGYOR à violet, indigo, blue, green, yellow, orange, and red. -Why Does Dispersion Happen? *Recombination of the Spectrum of White Light –After dispersion, the seven colours of white light can be combined again to form white light. This process is called recombination of the spectrum. -Isaac Newton first showed recombination using two prisms: -Observations: TOTAL INTERNAL REFLECTION Total Internal Reflection is the phenomenon in which a light ray, traveling from a denser medium to a rarer medium, is completely reflected back into the denser medium at the boundary, instead of refracting out. -Conditions for TIR: TIR occurs only when both requirements are met. -TIR is used in: *HOW IS RAINBOW FORMED Rainbow is formed due to the combined effect of:Refraction + Dispersion + Internal Reflection 1. The presence of raindrops 2. Refraction and Dispersion 3. Internal Reflection 4. Emergence (Refraction Again) 5. Rainbow Formation ATMOSPHERIC REFRACTION -Atmospheric refraction refers to the bending of light as it passes through the Earth’s atmosphere, which is made up of layers of varied density. -Air’s refractive index varies with temperature and pressure, leading to this phenomenon. -The atmosphere is composed of multiple layers of air with different densities. -Light from a distant object bends gradually as it travels through these layers. 1. Twinkling of Stars -Stars are far away and appear as point sources of light. -Starlight passes through the Earth’s atmosphere, which has uneven air layers of various densities. -Because of atmospheric refraction, the path of starlight is always shifting. -The star’s apparent position and brightness fluctuate, giving the appearance of twinkling. # Why Planets Don’t Twinkle 2. Stars’ Apparent Position -The real position of a star is different from where we see it in the sky. -This happens because of atmospheric refraction -Starlight passes through the Earth’s atmosphere, which has layers of air with different densities. -As light bends continuously towards the normal while moving from rarer to denser layers, the star appears slightly higher than its actual position. 3. Advance Sunrise and Delayed Sunset -We see the Sun earlier than its actual rise and longer after its actual set. -This is due…

Category: Class 10