Evolutionary biology is the study of

Evolutionary biology is the study of changes and adaptions that occur and occurred in organisms trough-out time, and how these are linked to the diversity of species.

Hope it helped,

BioTeacher101

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primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs