The primary,but not only,process responsible for the modifications that occur in organisms over geological time is
A)genetic mutation.
B)natural selection.
C)morphological (phenotypic) modification.
D)increase in fitness.

Question

Quizplus · Accepted Answer

Natural selection is the process by which organisms with advantageous traits are better suited to survive and reproduce, passing on those traits to their offspring. Over time, this process can lead to significant and sometimes dramatic changes in the characteristics of a population, as advantageous traits become more common and less advantageous traits become less common or disappear altogether. While genetic mutation and morphological modification are certainly factors that can contribute to these changes, it is ultimately natural selection that drives the process of evolution. Increase in fitness is a result of natural selection, not the process responsible for modifications over time.

The Primary,but Not Only,process Responsible for the Modifications That Occur