A) How do fossils help to show the descent of modern species from ancient ancestors?

A)Fossils are important in estimating when different lineages were developed in the geological time scale.

Since fossilization is a small common piece, in which the existence of hard parts of the body and death can be combined in the vicinity of a place where the sediments are deposited, the fossil record only provides scattered and intermittent information about the evolution of the life.

B)Molecular biology concerns mainly the understanding of the interactions of the various systems of the cell, which includes the relations of the many, including those of DNA with RNA, protein synthesis and metabolism when studying the composition Different species Of living beings, providing valuable data for the knowledge of evolution.