Question

question 4 of 10
when a population is split into smaller groups, why do these groups develop different traits?
a. evolutionary mechanisms work on the two subgroups independently.
b. gene flow is increased in the two subgroups that are formed.
c. traits that form in one group from evolutionary forces quickly spread through both populations.
d. separating the two groups decreases the chance that the two groups will diverge.

Explanation:

When a population splits, gene flow between subgroups is reduced. Evolutionary mechanisms like natural selection, genetic drift, and mutation act independently on each subgroup. This leads to different trait development.

• Option B: Gene flow is decreased, not increased.
• Option C: Traits don't spread quickly between separated groups.
• Option D: Separating groups increases divergence chance.

Answer:

A. Evolutionary mechanisms work on the two subgroups independently.