ANATOMY

Detailed explanation-1: -The correct option is A evolution. Evolution is the slow, gradual process through which present day complex forms of life have descended from simple organisms of the past. This can be possible by the transfer of heritable traits down generations.

Detailed explanation-2: -Phyletic gradualism. Phyletic gradualism holds that morphological evolution is gradual and occurs independently of speciation.

Detailed explanation-3: -Evolution is a process of development from a simple to complex form.

Detailed explanation-4: -Evolution is a process of gradual change that takes place over many generations, during which species of animals, plants, or insects slowly change some of their physical characteristics.

Detailed explanation-5: -In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection.