Sarah loans Kim $500 and charges her 2% simple annual interest. Kim promises to repay Sarah in 18 months (1 year= 12 months) . About how much will Kim have to pay Sarah? Round your answer to the nearest cent.

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.

Amniocentesis is a process in which amniotic fluid is taken from the mother's womb to identify any genetic abnormalities in the fetus. how would the discovery of the human genome contribute to this process?

How does the nervous system affect the excretory system?