Question

all of these are examples of random evolutionary processes except
a.
an earthquake divides a single elk species into two populations, forcing
them to no longer interbreed.

b.
a mutation in a flower plant results in a new variety.

c.
an especially long winter causes a group of migrating birds to shift their
home range.

d.
a mutation results in a population of trees that spread their seeds more
widely than their peers, causing their population to grow.

Explanation:

Random evolutionary processes (like genetic drift, mutation, or random environmental events) are non - adaptive or random in their effect on evolution. Option A is geographic isolation (a random event) leading to speciation. Option B is a random mutation. Option C is a random environmental event (long winter) affecting migration. Option D describes natural selection: the mutation gives a reproductive advantage (spreading seeds more widely, leading to population growth), which is an adaptive, non - random evolutionary process as it's based on fitness. So D is not a random evolutionary process.

Answer:

D. a mutation results in a population of trees that spread their seeds more widely than their peers, causing their population to grow.