What evidence suggests that c-opsins were present in the common ancestor of all living vertebrates?
A) All vertebrates carry c-opsin.
B) C-opsins have the same basic molecular shape in all vertebrates.
C) C-opsins have the same basic functional pathway in all vertebrates.
D) all of the above
E) none of the above

Question

Quizplus · Accepted Answer

All of the options provided (A, B, C) suggest that c-opsins were present in the common ancestor of all living vertebrates. This is because the presence of c-opsins across all vertebrates, their consistent molecular shape, and their shared functional pathway across different species indicate a common ancestral origin.

What Evidence Suggests That C-Opsins Were Present in the Common