Evolution Definition

Homologous Structures

A homologous structure is an example of an organ or bone that appears in different animals, underlining anatomical commonalities demonstrating descent from a common ancestor.

Vestigial Structures

A structure in an organism that has lost all or most of its original function in the course of evolution, such as human appendixes.

Adaptation

An adaptation, also called an adaptive trait, is a trait with a current functional role in the life of an organism that is maintained and evolved by means of natural selection.

Analogous Structures

Analogous structures pertain to the various structures in different species having the same appearance, structure or function but have evolved separately, thus do not share common ancestor.

Evolution

Evolution is change in the heritable traits of biological populations over successive generations.

Artificial Selection

The breeding of plants and animals to produce desirable traits.

Fitness

The condition of being physically fit and healthy.

Natural Selection

The process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expoun