Arestriction in genetic variability caused by a drastic reduction in population size is called a
a.
founder effect.
b.
hardy-weinberg effect.
c.
bottleneck effect.
d.
polymorphic effect.
e.
adaptive effect.

the answer is c.) there is a warm front in region a and a stationary front in region b.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms