Evolution is A. a rare event.

B. currently occurring ONLY in scientific laboratories.

C. constantly occurring at the same rate in ALL organisms.

D. a process that occurs as a result of differences in reproductive fitness.

E. a process that occurred only in the past.

C

Explanation:

Evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection.

C. constantly occurring at the same rate in ALL organisms.

Explanation:

Evolution is constantly occurring at the same rate in all organisms.

mountains can affect the climate of nearby lands. in some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. much of airborne moisture falls as rain on the windward side of mountains.

explanation:

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?