Assertion: The embryos of fish, salamander, tortoise, chick and a man, of same age resemble one another closely.
Reason: Ontogeny recapitulates phylogeny.

Answer

A

Explanation

The early embryos in all the vertebrates exibit remarkable similarity and it is not easy to differentiate a human embryo from the embryo of chick, lizard, from or fish in early stages. This can be explained by 'biogenetic law ontogeny is the ife history of the individual starting from individual which must have incurred in the evolution of the group of this individual. it means that in individual during its development briefs its ancestral history.