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.

Answer 1

Answer:

Explanation:

The study of one type of evidence of evolution is called embryology, the study of embryos. ... For example, fish embryos and human embryos both have gill slits. In fish they develop into gills, but in humans they disappear before birth.

Answer 2

Answer:

They both have embryos with gill slits and tails.

Explanation:

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