12. What do many scientists conclude about vertebrates from studying their embryological development?
A. Vertebrate embryos have the same features throughout their entire development until birth.
B. It is very unlikely that vertebrates share a common ancestor since their embryos do not develop exactly the same way.
C. An embryo could start as one type of animal (ex: reptile), but then could change and develop into another type of animal (ex: mammal).
D. Vertebrates might share a common ancestor since their embryos share some similarities during development.