Respuesta :
horse and zebra are most related to embryonic development because their molecular and amino acids are almost identical.
The correct answer is horse and zebra.
Horse and Zebra are members of class a Mammalia. A mammal develops from one celled zygote, which is a fusion product of an ovum or egg and a sperm. After fertilization the zygote undergoes cleavage, increasing the number of cells. After repetitive division blastocyst are formed. The blastocyst is characterized by a group of cells, called the inner cell mass or embryo blast) and the trophoblast.