Question

Which has been observed in the study of embryology

Answer 1

I think that the study if embryology means that it is the study of the embryo. For example how the Human and dolphin embryo both look the same when developing and the human embryo forms legs and looses the tail, the dolphin embryo grows the tail ouy and gets rid of the small formation of legs. Hope this helps I don't really remember much.

Answer 2

D) Some traits in certain embryos disappear as the embryo develops.

Step-by-step explanation:

If you're in the same curriculum as I am, then this is your answer, for both the OP and anyone else who needs help. You're welcome guys! :)