Which statement below is believed to be true concerning radioactive decay?
It occurs at a predictable rate
It speeds up when temperature rises.
It slows when pressure is added
It occurs only in the sun.
A mountain, ocean or ravine divides a population. After many years, the organisms show genetic differences from the original population. Which of the following explains how this change occurred?
divergent evolution
convergent evolution
co-evolution
immigration
Brown bears and polar bears are examples of
co-evolution.
convergent evolution.
divergent evolution.
emigration
Which statement below is true concerning mixing of gene pools?
It promotes diversity
It increases the number of organisms.
It reduces the number of organisms
It reduces diversity
