"Why do organisms with close biochemical similarities show stronger evolutionary relationships?
a. They have varied and different ancestry.
b. They have similar patterns during their early stages of development.
c. They have a common ancestor and have the same kind of proteins.
d. They possess same vestigial structure that made their evolutionary relationship closer."



They show stronger biochemical similarities and evolutionary relationship if they share common ancestors and have the same kinds of protein.

letter C.
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