Question

which environmental factor would likely lead to an increase in genetic variation in a population of squirrels?
o an increase in predators
o an increase in available food
o an increase in forest fires
o an increase in pollution

Explanation:

• An increase in predators would likely lead to natural selection, reducing genetic variation as only certain traits (e.g., better - hiding or faster - moving) are favored.
• An increase in forest fires and pollution are likely to be harsh selective pressures. Forest fires can destroy habitats and directly kill squirrels, while pollution can cause health issues and reduce the population size, both potentially reducing genetic variation.
• An increase in available food means less competition for survival. With more resources, a larger number of squirrels can survive and reproduce. This allows for a greater number of individuals to contribute their genes to the gene pool, increasing genetic variation.

Answer:

an increase in available food