Biodiversity and Conservation

Explain 'The Evil Quartet' — the four major causes of biodiversity loss. How does habitat fragmentation contribute to species extinction?

Why is species diversity generally higher in the tropics than in temperate or polar regions? State any two reasons.

State the species-area relationship given by Alexander von Humboldt. What does the slope of the line (z value) represent, and what is its typical range?

Differentiate between in-situ and ex-situ conservation of biodiversity, giving two examples of each.

Explain the narrowly utilitarian, broadly utilitarian and ethical arguments for conserving biodiversity, giving an example for each.

What are biodiversity hotspots? Name the three biodiversity hotspots located in India.

Explain the three levels of biological diversity: genetic diversity, species diversity and ecological diversity, with an example of each.

What is meant by the term 'endemic species'? Give one example from India.

How many marks is Biodiversity and Conservation worth in the Class 12 board exam?

Around 5 marks of the 70-mark CBSE Biology theory paper, based on the official unit-wise weightage. Biodiversity patterns + in-situ/ex-situ conservation.

Is Biodiversity and Conservation easy or hard?

It's rated easy — one of the easier chapters in Class 12 Biology. Most students need about 2 hours to cover it well.

What should I focus on in Biodiversity and Conservation?

Going by the board papers themselves, the recurring areas are Loss of Biodiversity, Biodiversity Patterns, Species-Area Relationship, Conservation, Importance of Biodiversity — that's where the marks actually sit.

What questions come from Biodiversity and Conservation in board exams?

Between 2019–2024, CBSE board papers asked questions from this chapter on Loss of Biodiversity, Biodiversity Patterns, Species-Area Relationship, Conservation — 1- to 5-mark questions.