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All Class 12 Biology UnitsUnit X • Ecology

Ecology and Environment

Population Dynamics, Ecosystem Energetics & Global Biodiversity Conservation

Organism and environmental adaptations, population attributes and growth models, ecosystem trophic structures and nutrient cycles, biodiversity gradients, extinction causes, and biosphere reserves.

Unit Chapters
3Chapters
NEET Weightage
14-16% (9-10 Qs)
Standard
100%NCERT
Showing 3 of 3 Chapters
CHAPTER 11

Organisms and Populations

Regulate, Conform, Migrate, Suspend Adaptations, Exponential vs Logistic (Verhulst-Pearl) Growth Curve, Population Interactions (+/+, +/-, +/0, -/-), Gause's Competitive Exclusion Principle.

Chapter 11 • NCERT
CHAPTER 12

Ecosystem

Productivity (GPP vs NPP) & Decomposition, Trophic Levels & 10% Energy Transfer Law, Ecological Pyramids (Upright vs Inverted), Hydrarch & Xerarch Ecological Succession.

Chapter 12 • NCERT
CHAPTER 13

Biodiversity and Conservation

Species-Area Relationship (Alexander von Humboldt), The Evil Quartet (Habitat Loss, Over-exploitation, Alien Species, Co-extinctions), In-Situ Conservation (National Parks, Sanctuaries, Biosphere Reserves), Ex-Situ Conservation (Botanical Gardens, Cryopreservation, Gene Banks).

Chapter 13 • NCERT