By the mid-twentieth century,the causes of evolution were seen as all of the following EXCEPT:
A)natural selection.
B)macromutation.
C)gene flow.
D)genetic drift.

Question

Quizplus · Accepted Answer

By the mid-twentieth century, the causes of evolution were seen as natural selection, gene flow, and genetic drift. Macromutation was not considered a significant factor or mechanism of evolution during this time period.

By the Mid-Twentieth Century,the Causes of Evolution Were Seen as All