A molecule that can mix with water and a store for energy in the body

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.

How are fossils used to date organisms?