A scientist notices that a lot more polar bears living in the warmer parts of the Arctic Circle have darker fur than they did 30 years ago. She wonders if this is an adaptation to global warming. Which of the following terms might help explain the increase in the number of darker polar bears?

Question

Quizplus · Accepted Answer

All the terms listed can contribute to explaining the phenomenon: genetic diversity provides the variation needed for adaptation; adaptation refers to the trait changes that improve survival; evolution is the process of change over time; and selective pressure from environmental changes like global warming can drive these changes.

A Scientist Notices That a Lot More Polar Bears Living