Question

many kangaroo rats live in the sonoran desert of the southwestern united states. they have a variety of adaptations for living in the desert. under which circumstance would the kangaroo rats of the sonoran desert be most likely to develop new adaptations by natural selection?a. variations decrease among the kangaroo rats of the sonoran desert.b. the climate of the sonoran desert becomes colder and wetter.c. the climate of the sonoran desert remains constant for many years.d. natural predators of the sonoran desert kill many kangaroo rats each year.

Explanation:

Natural selection drives new adaptations when environmental conditions change, creating new selective pressures. A colder, wetter desert would alter the resources and challenges the kangaroo rats face, favoring traits suited to the new environment. Stable conditions or consistent predation do not drive new adaptive changes as strongly.

Answer:

B. The climate of the Sonoran Desert becomes colder and wetter.