CSIR NET Life Science Unit 10 MCQs with Answers

Here below are 15 core Ecological Principles topics across five parts. Choose Easy, Medium or Difficult for each topic to practise 15 questions per level. Answers show the correct option and explanation immediately.

Part 1: Topics 1–3

1. Ecological Levels and Environment

15 questions per difficulty level · Select a level

2. Abiotic Factors and Adaptations

15 questions per difficulty level · Select a level

3. Population Growth Models

15 questions per difficulty level · Select a level

Part 2: Topics 4–6

4. Life Tables and Life History

15 questions per difficulty level · Select a level

5. Species Interactions

15 questions per difficulty level · Select a level

6. Community Structure and Diversity

15 questions per difficulty level · Select a level

Part 3: Topics 7–9

7. Ecological Succession

15 questions per difficulty level · Select a level

8. Food Webs and Energy Flow

15 questions per difficulty level · Select a level

9. Biogeochemical Cycles

15 questions per difficulty level · Select a level

Part 4: Topics 10–12

10. Biomes and Ecosystem Types

15 questions per difficulty level · Select a level

11. Behavioural Ecology

15 questions per difficulty level · Select a level

12. Animal Communication and Sociality

15 questions per difficulty level · Select a level

Part 5: Topics 13–15

13. Island Biogeography and Metapopulations

15 questions per difficulty level · Select a level

14. Conservation Ecology

15 questions per difficulty level · Select a level

15. Climate Change and Applied Ecology

15 questions per difficulty level · Select a level

Frequently Asked Questions

What is the difference between a habitat and a niche?

Habitat describes where an organism lives; niche describes its ecological role, resource use and environmental requirements.

How does exponential population growth differ from logistic growth?

Exponential growth assumes a constant per-capita growth rate; logistic growth slows as population size approaches carrying capacity.

What does the Shannon diversity index measure?

It summarizes community diversity by incorporating species richness and the relative abundances of species.

How does primary succession differ from secondary succession?

Primary succession begins where established soil is absent; secondary succession follows disturbance where soil remains.

What is the relationship between natural selection and adaptation?

Natural selection changes the frequency of heritable traits; over generations it can produce adaptations that improve fitness in a given environment.

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