Question

Which of the statements below best explains the presence of these structures in the embryos of all three species ? A The embryos of the three species are similar in size. B Breathing structures are similar among the young of the fish, chicken, and pig. C The fish, chicken, and pig have a common ancestor with these embryonic structures. D The reproductive mechanisms are similar among the adults of the fish, chicken, and pig.

Answer 1

In biology, a SPECIES is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. 

Answer 2

Answer:

Option C.

Explanation:

Comparative embryology is helpful to identify the evolutionary history at embryo level. Haeckel's explained the comparative evolutionary studies of embryo and explained biogenetic law that ontogeny repeats phylogeny.

Embryological evidence has explained that the embryos of fishes, amphibians, birds, reptiles and mammals look similar and share a common ancestor. Fish, chicken and pig looks similar at the time of embryological development and they all share a common ancestors.

Thus, the correct answer is option C.