In Kluane National Park, red squirrels have been recorded giving birth 18 days earlier than a decade ago. Offspring born earlier become larger and more likely to survive. What mode of selection best describes these current research findings?
A)stabilizing selection
B)directional selection
C)disruptive selection
D)transitional selection
E)Selection will vary depending on temperature and amount of snow in spring.

Question

Quizplus · Accepted Answer

The earlier birth of offspring that are larger and more likely to survive indicates that there is a directional selection in play. This means that there is a selective pressure pushing the population towards a particular direction, in this case, towards earlier births.

In Kluane National Park, Red Squirrels Have Been Recorded Giving