AP BIOLOGY

Detailed explanation-1: -evolution from distant common ancestor evolutionary relationship between the groups similar environments in the past recent common ancestry Some organisms that share common ancestor have features that have different functions; but similar structures.

Detailed explanation-2: -Similarities in embryos are evidence of common ancestry. All vertebrate embryos, for example, have gill slits and tails (see the Figure below). Most vertebrates, except for fish, lose their gill slits by adulthood. Some of them also lose their tail.

Detailed explanation-3: -Similarities in structure among distantly related species are analogous if they evolved independently in similar environments. They provide good evidence for natural selection. Examples of evidence from embryology which supports common ancestry include the tail and gill slits present in all early vertebrate embryos.

Detailed explanation-4: -Similar anatomy across different species highlights their common origin and can be seen in homologous and vestigial structures. Embryology provides evidence for evolution since the embryonic forms of divergent groups are extremely similar.

Detailed explanation-5: -This shows that the animals are similar and that they develop similarly, implying that they are related, have common ancestors and that they started out the same, gradually evolving different traits, but that the basic plan for a creature’s beginning remains the same.