5
practice testMultiple Choice

Practice Test

Question 5 • TPS EdX Biology

Why do a chicken embryo and a cow embryo look very similar even though the adults do not?

Answer
A
The genetic makeup of the two species changes during development.
B
They are not related, but still have similar development.
C
They are distantly related, so their development is similar.
D
The embryos mutate in utero to form different structures.

Explanation

Chickens and cows are both vertebrates and share a common evolutionary ancestor. Their embryos use similar inherited developmental patterns, even though they become very different adults; their genetic makeup does not change into a different species during development. The best choice is “They are distantly related, so their development is similar.”

AI-written and checked against the verified answer.

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