Co-extinctions: Dependent Species Extinction — NEET Biology
📚 Practice ConceptCo-extinctions: When a species becomes extinct, the plant and animal species associated with it in an obligatory way also become extinct. When a host fish species becomes extinct, its unique assemblage of parasites also meets the same fate. Another example is the case of a coevolved plant-pollinator mutualism where extinction of one invariably leads to the extinction of the other.
Assertion (A): Species extinctions can have cascading effects on other species. Reason (R): When a species becomes extinct, plant and animal species associated with it in an obligatory way also become extinct.
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 “When a species becomes extinct, the plant and animal species associated with it in an obligatory way also become extinct.” Both statements are true from NCERT. The Reason explains the mechanism of cascading effects - obligatory associations mean dependent species cannot survive when their partner becomes extinct (co-extinction).
What does NCERT say about Co-extinctions When species becomes?
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