Which environmental factor would likely lead to an increase in genetic

Subject : Biology

Question: Which environmental factor would likely lead to an increase in genetic variation in a population of squirrels?

A) an increase in predators

B) an increase in available food

C) an increase in forest fires

D) an increase in pollution

Expert Verified Solution:

The correct answer is:

C) an increase in forest fires

Explanation: An increase in forest fires would likely lead to an increase in genetic variation in a population of squirrels. Environmental factors like forest fires can cause significant changes in an ecosystem, leading to habitat destruction and the need for species to adapt to new conditions. This can create selective pressures that favor certain genetic traits over others.

As some squirrels might be better adapted to survive in post-fire environments, their specific genetic traits (like behaviors, physical characteristics, or reproductive strategies) might become more common in the population. Over time, this can lead to increased genetic variation as new traits emerge and become established within the population due to natural selection.

On the other hand, options A (increase in predators), B (increase in available food), and D (increase in pollution) may not directly cause an increase in genetic variation. These factors could lead to different evolutionary outcomes but are less likely to result in the broad genetic diversity prompted by habitat changes following forest fires.