evolutionary

a. 发展的(展开的,调优的)

The evolutionary decline or loss of a function, characteristic, or structure in an organism or a species.

退化（作用）一个生物体或物种的某种功能、特征或结构由于进化作用造成的衰退或丧失

Correspondence between parts or organs arising from evolutionary convergence.

异体同功由进化趋同而产生的部分或器官之间的对应现象