Class 12 Biology

Chapter 16 — Environmental Issues — is the final chapter covering pollution, waste management, deforestation, ozone depletion, and global warming. […]

Chapter 14 — Ecosystem — covers energy flow, food chains, nutrient cycling, ecological pyramids, and succession. Carries 6-8 marks. Focus

Chapter 15 — Biodiversity and Conservation — covers types of biodiversity, patterns, threats (HIPPO), conservation strategies, and biodiversity hotspots. Carries

Chapter 13 — Organisms and Populations — introduces ecology concepts: organism responses to environment, populations and their attributes. Carries 4-6

Chapter 11 — Biotechnology: Principles and Processes — covers rDNA technology, tools (restriction enzymes, vectors, host organisms), and processes (PCR,

Chapter 12 — Biotechnology and Its Applications — covers applications in agriculture (Bt crops, Golden Rice), medicine (gene therapy, insulin),

Chapter 10 — Microbes in Human Welfare — covers the beneficial uses of microorganisms in food, medicine, agriculture, and waste

Chapter 9 — Strategies for Enhancement in Food Production — covers plant breeding, animal husbandry, tissue culture, and single cell

Chapter 7 — Evolution — traces the story of life from origin to the diverse species we see today. It

Chapter 8 — Human Health and Disease — covers common diseases, immunity, cancer, drugs/alcohol abuse. Carries 6-8 marks. Focus on