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Describe how the ancestors of whales moved from the land to the sea.
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Describe how the ancestors of whales moved from the land to the sea.

User Dobob
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Answer:

To swim, they move their tails up and down, rather than back and forth as fishes do. This is because whales evolved from walking land mammals whose backbones did not naturally bend side to side, but up and down.

Step-by-step explanation:

User Chan Youn
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