Ecology and Environment | Unit -X: Chapter 03 - Biodiversity and Conservation CUET (UG) Biology Notes: Biodiversity and Conservation (Plain Text Format) Here are your strictly NCERT-based notes for Biodiversity and Conservation. They are formatted in plain text, making them incredibly easy to copy and paste directly into your Google Docs for rapid CUET revision. 1. Biodiversity: Concept and Levels Biodiversity refers to the combined diversity at all the levels of biological

Ecology and Environment | Unit -X: Chapter 02 - Ecosystems CUET (UG) Biology Notes: Ecosystem 1. Ecosystem: Structure and Function An ecosystem is a functional unit of nature, where living organisms interact among themselves and also with the surrounding physical environment. Stratification: The vertical distribution of different species occupying different levels in an ecosystem. Example in a forest: Trees occupy the top vertical strata or layer, shrubs the second, and herb

Ecology and Environment | Unit-X: Chapter 01 -Organisms and Populations CUET (UG) Biology Notes: Organisms and Populations 1. Population Attributes A population is a group of individuals of the same species living in a well-defined geographical area, sharing or competing for similar resources, and potentially interbreeding. Birth and Death Rates: Unlike an individual which has birth and death, a population has birth rates (natality) and death rates (mortality). These are expr

Biotechnology and its Applications | Unit -IX: Chapter 02 - . Biotechnology and its Applications CUET (UG) Biology Notes: Biotechnology and its Applications 1. Application of Biotechnology in Agriculture Biotechnology offers the integration of Genetically Engineered (GE) crop-based agriculture as an alternative to conventional agrochemical-based or organic farming. Genetically Modified Organisms (GMOs) Plants, bacteria, fungi, and animals whose genes have been altered by mani

Biotechnology: Principles and Processes (Unit -IX: Biotechnology and its Applications | Chapter 01 ) CUET (UG) Biology Notes: Microbes in Human Welfare 1. Microbes in Household Products Curd: Micro-organisms such as Lactobacillus and others commonly called Lactic Acid Bacteria (LAB) grow in milk and convert it to curd. During growth, LAB produce acids that coagulate and partially digest the milk proteins. +2 Nutritional Benefit: It improves nutritional quality by increasing V

Unit - VIII(Biology and Human Welfare) | Chapter 01 - Human Health and Disease CUET (UG) Biology Notes: Human Health and Disease 1. Introduction to Health Health is defined as a state of complete physical, mental, and social well-being, not merely the absence of disease. Factors Affecting Health: 1. Genetic disorders (deficiencies acquired from parents).2. Infections.3. Lifestyle (food, water, rest, exercise, and habits). Pathogens: Disease-causing organisms (bacteria, viruse

Unit - VII | Chapter 03 - Evolution CUET (UG) Biology Notes: Evolution 1. Origin of Life The universe is about 20 billion years old. The Big Bang theory attempts to explain the origin of the universe. Earth was formed about 4.5 billion years ago. Early Earth Conditions: There was no atmosphere. Water vapor, methane (CH_4), carbon dioxide (CO_2), and ammonia (NH_3) released from molten mass covered the surface. UV rays from the sun broke up water into Hydrogen and Oxygen. Theo

Unit - VII | Chapter 02 -Molecular Basis of Inheritance CUET (UG) Biology Notes: Molecular Basis of Inheritance 1. Structure and Packaging of DNA DNA is a long polymer of deoxyribonucleotides. The length of DNA is defined by the number of base pairs (bp). The Double Helix Model (Watson & Crick, 1953) Backbone: Formed by sugar-phosphate. Bases project inwards. Base Pairing: Adenine pairs with Thymine (2 hydrogen bonds); Guanine pairs with Cytosine (3 hydrogen bonds). Purines a

Principles of Inheritance and Variation (Unit - VII | Chapter 01) CUET (UG) Biology Notes: Principles of Inheritance and Variation 1. Mendel's Laws of Inheritance (One Gene) Gregor Mendel conducted hybridization experiments on garden peas (Pisum sativum) for seven years (1856–1863). Key Concepts & Crosses Phenotype: The physical expression of a trait (e.g., Tall or Dwarf). Genotype: The genetic makeup of an organism (e.g., TT, Tt, tt). Alleles: Genes which code for a pair of

Reproductive Health (Unit - VI | Chapter 03) CUET (UG) Biology Notes: Reproductive Health 1. Reproductive Health: Problems and Strategies Reproductive health refers to total well-being in all aspects of reproduction (physical, emotional, behavioral, and social). Family Planning Programs: India was one of the first nations to initiate action plans at a national level (1951) to attain total reproductive health. RCH Programs: Currently operating under the name Reproductive and C

SEXUAL REPRODUCTION IN FLOWERING PLANTS (UNIT- VI | Chapter 01) Sexual Reproduction in Flowering Plants 1. Pre-Fertilisation: Male Reproductive Structures Structure Key Characteristics & Functions Stamen The male reproductive organ, consisting of a long, slender stalk (filament) and a terminal, generally bilobed structure (anther). Anther & Microsporangium A typical angiosperm anther is bilobed and dithecous (two microsporangia per lobe, making it tetrasporangiate). Microspor

Biology These notes are designed exactly as per CUET Biology Syllabus for 2026 Unit-VI: Reproduction Sexual Reproduction in Flowering Plants Human Reproduction Reproductive Health Unit-VII: Genetics and Evolution Principles of Inheritance and Variation Molecular Basis of Inheritance Evolution Unit-VIII: Biology and Human Welfare Human Health and Disease Microbes in Human Welfare Unit-IX: Biotechnology and its Applications Biotechnology: Principles and Processes Biotechnology