According to embryology, why do fish and birds have a common ancestor? They both have embryos with gill slits

Question

According to embryology, why do fish and birds have a common ancestor?

They both have embryos with gill slits and tails.
They both have embryos with traits that eventually disappear.
They both have embryos that develop into adults.
They both have embryos that form from a fertilized egg.

GPT-5 mini · Answer

They both have embryos with gill slits and tails.

Explanation: Similar embryonic structures (like pharyngeal/gill slits and a post‑anal tail) in different vertebrates are homologous traits inherited from a common ancestor; their temporary presence in embryos is evidence of that shared ancestry.

According to embryology, why do fish and birds have a common ancestor?

They both have embryos with gill slits and tails.
They both have embryos with traits that eventually disappear.
They both have embryos that develop into adults.
They both have embryos that form from a fertilized egg.

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According to embryology, why do fish and birds have a common ancestor? They both have embryos with gill slits and tails. They both have embryos with traits that eventually disappear. They both have embryos that develop into adults. They both have embryos that form from a fertilized egg.

All Answers 1

Submit Your Answer

According to embryology, why do fish and birds have a common ancestor?

They both have embryos with gill slits and tails.
They both have embryos with traits that eventually disappear.
They both have embryos that develop into adults.
They both have embryos that form from a fertilized egg.