Question

Which of the following best describes why scientists often study embryonic structures when determining evolutionary relationships?
A.
Organisms from different kingdoms always have similar embryonic structures.
B.
Examining embryonic stages allows scientists to better understand the behaviors of organisms.
C.
There are sometimes similarities in the embryonic stages of organisms that do not exist in the adult stages.
D.
Adult organisms from different species never possess similar anatomical structures.

Answer 1

There are sometimes similarities in the embryonic stages of organisms that do not exist in the adult stages.

Answer 2

C. There are sometimes similarities in the embryonic stages of organisms that do not exist in the adult stages.