Answer:
They reproduce.
Explanation:
Reproduction is the phenomenon which involves the production of an offspring by particular individual or individuals to propagate their species. Reproduction is done during reproductive phase. Unicellular organisms are single-celled forms whereas multicellular organisms are made up of many cells.
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<span>The answer is sympatric
speciation. This is differentiated from allopatric speciation that involves the
divergence of a species due to the separation of parts of the population by a
geographical feature (such as a valley of the mountain). In sympatric
speciation, the divergence may be due to behavioral and reproductive isolation
within the population</span>
The body constantly makes new cells for the purposes of growth or the replacement of old, damaged, or recently dead cells.
