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Biology

Biodiversity and Conservation

Levels of biodiversity, the species-area relationship, latitudinal gradients, causes of loss, and in-situ versus ex-situ conservation close the ecology unit. Recall carries most questions, with the species-area graph and hotspot or sanctuary facts as regulars.

Exam rules change between cycles. Confirm dates, syllabus and pattern against NTA's official site. We are not NTA.

Weightage: what the paper actually did

Biodiversity and Conservation carried 5 questions in the NEET 2026 paper. One paper is a data point, not a destiny: NTA moves weight between chapters every cycle, which is why the weightage tables deserve care. The stable facts are the paper's shape: 180 questions, 720 marks, +4 right, −1 wrong.

Sample PYQs from this chapter

Real questions NTA asked from Biodiversity and Conservation, with the answer and the working. Try before you peek.

Question 1 · NEET 2026

"The Evil Quartet" of biodiversity loss includes which of the following?
  1. A.Over-exploitation; Alien species invasions; Air pollution; Co-extinctions
  2. B.Habitat loss and fragmentation; Air pollution; Water pollution; Co-extinctions
  3. C.Habitat loss and fragmentation; over-exploitation; Alien species invasions; Co-extinctions
  4. D.Over-exploitation; Alien species invasions; Soil pollution; Co-extinctions
Answer and explanation

Answer: C

The Evil Quartet names the four major drivers of biodiversity loss: habitat loss and fragmentation, over-exploitation, alien (invasive) species invasions, and co-extinctions. Only option C lists exactly these; the others wrongly substitute air, water or soil pollution, which are not part of the quartet. Why the other options are wrong: - (A) Air pollution is not part of the quartet. - (B) Air and water pollution replace two true causes. - (D) Soil pollution is not part of the quartet.

Question 2 · NEET 2026

Since the origin and diversification of life on Earth, there have been five episodes of mass extinction of species. How is the sixth extinction, which is in progress, different from the previous episodes?
  1. A.The present net species extinction rate is zero.
  2. B.The current species extinction rate is nearly 10 times faster than in previous episodes.
  3. C.The present species extinction rates are 100 to 1000 times faster than in the pre-human times.
  4. D.The current species extinction rates are far lower than those in previous episodes.
Answer and explanation

Answer: C

The current, sixth episode of mass extinction is estimated to be 100 to 1000 times faster than the natural (pre-human) background rate, largely because of human activities. Options stating the rate is zero or far lower are false, and the '10 times' figure greatly understates the accepted estimate. Why the other options are wrong: - (A) The extinction rate is clearly not zero; species are being lost now. - (B) The accepted estimate is far higher than 10 times the background rate. - (D) Current rates are much higher, not lower, than natural episodes.

How to practise Biodiversity and Conservation

Chapter by chapter, against real past-paper questions, on a screen: NEET is computer based from 2027. Read the chapter once, then attempt its PYQs until your accuracy stops climbing, and let the wrong answers tell you which lines to reread. If the chapter keeps refusing to stick, that has its own guide. There is also a free 12-question mock on the exam screen.

Nearby Biology chapters

Questions

How many questions did Biodiversity and Conservation have in NEET 2026?

Biodiversity and Conservation carried 5 questions in the NEET 2026 paper. Weightage shifts between cycles, so treat it as a probability, not a promise.

Where can I practise Biodiversity and Conservation PYQs for NEET?

In the BrainIt app, free until the 2027 exam: its bank holds 50,000 past NTA questions tagged to all 83 chapters, including this one, with accuracy tracked per chapter. Sample questions from this chapter are on this page.

Is Biodiversity and Conservation important for NEET 2027?

It is part of the Biology syllabus the paper draws from, and NEET 2027 is computer based, so practise it on a screen. Your own accuracy in the chapter matters more than any weightage table: a heavy chapter you already score well on needs less time than a light one you keep missing.

Something here wrong or out of date? Email [email protected] and a person will read it.