Science

Structure from same ancestor but modified to perform different function

• homologous structure

• heterogonous structure

• analogous structure

• amalogous structure

Structure in a different ancestor but adopted to a similar function

• homologous

• heterogous

• analogous

• amalogous

The organism change in response to thier environment.

• theory of acquired characteristic

• theory of use and disuse

• theory of need

The organs not in use will disappear while organs in used will develop.

• theory of acquired characteristic

• theory of use and disuse

• theory of need

If the organism changes during life in order to adapt to its environment those changes are passed to its offspring.

• theory of acquired characteristic

• theory of use and disuse

• theory of need