The answer is to fill different niches.
<span>Adaptive radiation is the process of development of new forms
of organisms from an ancestral species. <u>When an environment changes or some new
niches open, speciation from the ancestral species occurs. </u>New species have morphological and
physiological adaptations which allow them to exploit a whole range of
divergent environment.</span>
Because the time span of Earth's past is so great, geologists use the geologic time scale to show Earth's history.
Hope this helped
Economic growth and development
True if it is a true or false question
