The diagram shows the embryological development of a fish, salamander, turtle, and chick. The top of the diagram shows the early embryos of each organism. The bottom of the diagram shows the embryos later in development. What similarities exist between the early embryos of all four organisms? What do these similarities indicate about the organisms?

In the earliest stages of development, all four organisms have a knobby head, gill slits, and a tail. These similarities tell us that all four of these organisms have a common ancestor.

Explanation:

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luisvaschetto luisvaschetto · Answer 2 · 2021-10-30T16:36:54+02:00

All vertebrate embryos exhibit gill slits and tails during early embryo development. These similarities are a piece of evidence that all vertebrates have evolved from a common ancestor that they all share.

Homologies represent similar physical traits in organisms that evolved from a common ancestor.

Embryonic homologies are similarities observed prior to adulthood, which develop from the same developmental precursor tissue/cell type.

All early embryos of vertebrates (e.g., fish, salamander, turtle, and chicken) exhibit homologous structures such as gill slits and tails.

Comparative embryology is fundamental in evolutionary biology because this field of study can evidence homologies formed during development but may later disappear.

In conclusion, homologies during embryo development are a piece of evidence that all vertebrates have evolved from a common ancestor that they all share.

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