The decisive embryological evidence for evolution is ..

The decisive embryological evidence of evolution is the similarity of the individual development of embryos of different classes of animals in the early stages. This is confirmed by Baer’s law, which states that embryos in the early stages of their development are very similar to each other, It is also called the law of embryonic similarity. That is, the embryo of a mammal is very similar to the embryos of amphibians, birds, fish, and not to their adult, these corresponding animals.