Choose the reason why a whale is closer to mammals than fishes.

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They give birth to a young one.

They both live in water.

They both can fly.

They both can climb trees.

answer is B.

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Detailed Solution

Whales are more closely related to mammals than fish because they share a more recent common ancestor with mammals. Whales are classified as a highly specialized group of mammals in the taxonomic group Cetacea, which also includes dolphins and porpoises. Like other mammals, whales give birth to live young and have mammary glands and hair (not hairy skin). Fish are aquatic, cold-blooded creatures with gills for absorbing dissolved oxygen, and most of them lay eggs (not the majority). Whales are therefore mammals, while fish are classified as Pisces (a term that is not commonly used in modern taxonomy).

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