Threats to Biodiversity · NCERT Biology

Stellar’s sea cow and the Passenger pigeon became extinct due to:

  1. Alien species invasion disrupting local food webs
  2. Over-exploitation by humans or commercial harvest
  3. Co-extinction through obligate mutualism breakdown
  4. Habitat fragmentation isolating small populations
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Correct answer: Co-extinction through obligate mutualism breakdown

In an obligate mutualism, such as the one between a specific fig species and its wasp pollinator, the loss of one partner inevitably leads to the loss of the other, as neither can complete their life cycle alone.

Difficulty: Medium Question 11 of 20

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