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lawyer [7]
4 years ago
11

PLZ HELP!! WILL MARK!

Biology
1 answer:
AlekseyPX4 years ago
4 0
Cetaceans are evolved from mammals ! Cetaceans are thought to have evolved during the Eocene or earlier, sharing a closest common ancestor with hippopotamuses.

They are descendents of Mammals !! And that four legged is hippo !!

So I think and sure of Mammals ....To be the answer !!
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