Question

Embryological studies suggest that the most ancient chordates were related to the ancestors of:




A. echinoderms


B. birds


C. dinosaurs


D. mollusks

Answer 1

It might be A but im not sure

Answer 2

I'm thinking D. because I think the ancestors have relatives that were similar to the ones listed here: http://evolution.berkeley.edu/evolibrary/article/_0_0/cambrian_12

Then again it could be A.

I'm not sure but I hope I helped :)