Threats to Biodiversity · NCERT Biology

A plant-pollinator mutualism where the extinction of one leads to the extinction of the other is an example of:

  1. Simultaneous extinction of two genetically unrelated species in the same region
  2. Extinction of a species when its obligate host or mutualistic partner goes extinct
  3. A mass extinction event triggered by a large-scale volcanic eruption
  4. Competitive exclusion leading to the extinction of a weaker native species
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Correct answer: Extinction of a species when its obligate host or mutualistic partner goes extinct

Co-extinction occurs when a species is obligatorily associated with another. For example, if a host fish becomes extinct, its unique assemblage of parasites also meets the same fate.

Difficulty: Medium Question 10 of 20

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