Biodiversity Loss and Conservation Crisis — NEET Biology
📚 Practice ConceptIt has taken millions of years of evolution, to accumulate this rich diversity in nature, but we could lose all that wealth in less than two centuries if the present rates of species losses continue. Biodiversity and its conservation are now vital environmental issues of international concern as more and more people around the world begin to realise the critical importance of biodiversity for our survival and well-being on this planet.
Assertion (A): Current biodiversity loss rates are unprecedented in evolutionary history. Reason (R): Biodiversity loss can occur in less than two centuries while biodiversity accumulation took millions of years of evolution.
View solution & NCERT explanation
Correct answer: A — If both assertion and reason are true and the reason is the correct explanation of the assertion.
NCERT states “It has taken millions of years of evolution, to accumulate this rich diversity in nature, but we could lose all that wealth in less than two centuries if the present rates of species losses continue.” Both statements are true from NCERT. The Reason explains WHY current loss rates are unprecedented - the temporal asymmetry between slow accumulation (millions of years) and rapid potential loss (centuries) demonstrates the unprecedented nature.
What does NCERT say about It has taken millions?
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Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.