Answer: B)
The chemical composition of the cell walls of each in the two kingdoms varies.
Explanation: Usatestprep
I don’t know why they make everyone type more than 20 characters but B sounds like the most reasonable answer.
Scientists think that dolphins and whales may have evolved from a common ancestor because they have similar anatomies.
<h3>What is a common ancestor?</h3>
A common means different animals now, have evolved from a single ancestor or animal.
These animals may share common characters and structures.
Whales, dolphins, and porpoises are evolved from a common ancestor; cetacean.
The animals that evolved from cetaceans are all aquatic, primitive cetaceans were amphibians too.
Thus, They have similar anatomies.
Learn more about ancestors
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B, C, D
A is r-selected species
