Describe why biologists consider an earthworm to be an organism

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.

The energy available as a result of the motion of a body is called energy. -potential -gravitational -kinetic -chemical

Were does condensation occur? a) hydroshereb) lithosherec) boishered) atmosphere