a scientist has been tracking and studying a population of deer in yellowstone national park. he surveys the…

a scientist has been tracking and studying a population of deer in yellowstone national park. he surveys the population every six months. usually, the population is thriving and has a gene pool with a wide variety of traits. but during one six - month period, an event occurred that affected the population, and when the scientist returned, the amount of genetic variation had decreased significantly. which of the following is most likely the event that occurred to change the population?\nyellowstone national park expanded its borders.\na population of wolves was introduced into yellowstone national park.\nthe amount of disease in the deer population decreased.\nmore grass and shrubs were planted in yellowstone national park.

a scientist has been tracking and studying a population of deer in yellowstone national park. he surveys the population every six months. usually, the population is thriving and has a gene pool with a wide variety of traits. but during one six - month period, an event occurred that affected the population, and when the scientist returned, the amount of genetic variation had decreased significantly. which of the following is most likely the event that occurred to change the population?\nyellowstone national park expanded its borders.\na population of wolves was introduced into yellowstone national park.\nthe amount of disease in the deer population decreased.\nmore grass and shrubs were planted in yellowstone national park.

Answer

Brief Explanations:

Wolves are predators of deer. Their introduction can cause significant selective pressure on the deer population, leading to a reduction in the number of deer with certain traits and thus decreasing genetic variation. Expanding park - borders, decreasing disease, and adding vegetation are less likely to cause a significant decrease in genetic variation.

Answer:

B. A population of wolves was introduced into Yellowstone National Park.