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NEST2022BiologyEvolution

On an island, black-bellied seed cracker birds feed primarily on seeds of two species of sedge plant. These seeds are similar in size but differ dramatically in their hardness. The distribution of bill size (as measured by the width of the lower section of the bill i.e. mandible) for an adult population of these birds is represented below. This distribution is most likely a result of:

Options

  1. Astabilizing selection
  2. Bdisruptive selection
  3. Cdirectional selection
  4. Dconvergent evolution

Correct answer

B. disruptive selection

Step-by-step solution

No solution available.

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