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BIO NMDCAT Lamarckism
nmdcat.online July 14, 2026

Which of the following is the best example of “disuse” of an organ leading to its reduction, according to Lamarck?

A. The vestigial wings of the kiwi bird
✓
B. The broad leaves of a tropical rainforest plant
C. The sharp claws of a predatory cat
D. The long tongue of an anteater

📝 Explanation

The kiwi bird lives on the ground with few predators; its lack of flight led to the disuse of wings, causing them to shrink and become vestigial over generations.

📖 Additional Information

  • The vestigial wings of the kiwi bird
  • The broad leaves of a tropical rainforest plant
  • The sharp claws of a predatory cat
  • The long tongue of an anteater

The kiwi bird lives on the ground with few predators; its lack of flight led to the disuse of wings, causing them to shrink and become vestigial over generations.

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