Which of these is NOT true about natural selection? A. Natural selection only applies to heritable traits. B. Natural selection usually occurs over a short period of time. C. Natural selection occurs to populations not individuals.

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure

Which is the best example of plant tissue? the answer is d (just took the test)