Select one of these examples A. A seal is an aquatic mammal with flipper-like ap

Question

Select one of these examples A. A seal is an aquatic mammal with flipper-like appendages adapted for movement in water. Explain how the flipper-like appendages of the seal may have evolved from the legs of an ancestral mammal. B. Some plants living in full sun exposure habitats have reddish leaves due to the presence of compounds called anthocyanins, which help protect against the bright sunlight. Explain how this trait may have evolved in plants that had greener leaves. C. The spiny fruit of the horse chestnut tree helps discourage herbivores from eating the seeds within. Explain how this spiny fruit may have evolved from a smoother surfaced fruit. D. Eagles are known for their exquisite eyesight, which helps them to spot prey from even great heights. Explain how this trait may have evolved within an ancestral species that had a lesser quality eyesight.

Explanation / Answer

Seals have an evolutionary link with terrestrial mammals. When Puijila darwini was discovered, they found that it was like an otter with webbed feet and a swimmer. This animal has legs which must have slowly evolved to flippers with natural selection. This animal was found in a lake suggesting that the ancestors of the seal also lived in fresh water and later migrated to aquatic habitats.

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