Question

Most moths of a particular population died when the chestnut blight fungus that they were dependent on got wiped out. But some moths did survive. Which mechanism explains the reason for this?

a.Gene flow
b.Genetic drift
c.Natural selection

Answer 1

The right answer for the question that is being asked and shown above is that: "b.Genetic drift." Most moths of a particular population died when the chestnut blight fungus that they were dependent on got wiped out. But some moths did survive. The mechanism explains the reason for this is that Genetic drift.

Answer 2

The correct answer is option b. "Genetic drift".

Step-by-step explanation:

Genetic drift is defined as a changes in a existing genotype among a population occurring just by chance, independently of a natural selection process. This changes are more evident when a population faces a devastating event like a disease, and only a few members of the population survive for being randomly resistant. Something similar is presented in the question, at which some moths survive to the chestnut blight fungus.