paleontologist is studying the embryos of two different squirrels. Her observations lead her to believe that the squirrels share a common ancestor.
Which statement justifies her conclusion?
• A. Both species live in the same tree.
• B. Both squirrels appear to have the same embryonic tissues.
• C. The adult squirrels are structurally different from each other.
D. Investigations provided information about how the squirrels adapted to changing environments.
B. Both squirrels appear to have the same embryonic tissues.
This statement justifies the conclusion because the paleontologist's observations of the embryos indicate commonality in the developmental stages and structures of the two squirrels. This suggests that they share a common ancestor. The other options do not provide direct evidence of a common ancestor.