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What is common to whale, seal and shark?

1. Thick subcutaneous fat
2. Convergent evolution
3. Homoiothermy
4. Seasonal migration

Correct answer: Convergent evolution

Solution

Whales, seals, and sharks all have streamlined bodies and similar swimming adaptations, but they come from very different evolutionary lineages. Those similarities are due to convergent evolution, where unrelated organisms independently evolve similar traits under similar selective pressures.

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