3. Highlight the answer that best completes this statement: A common
ancestor is:
one that is very commonly seen in the fossil record
one that is shared by two or more organisms
one that has no distinguishing features and is therefore very "common."



Answer :

Final answer:

A common ancestor is an organism shared by two or more species in evolutionary history.


Explanation:

A common ancestor is one that is shared by two or more organisms. It represents a point in the evolutionary tree where multiple species diverged from a single, ancestral organism. For example, Tiktaalik roseae is considered a common ancestor as it shares characteristics with both fish and terrestrial animals, like whales.


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