Describe the process of evaporation, condensation, and precipitation

Which pattern most likely came from a gunshot and which one was produced from a blow on the head? explain your answer?

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.

What is a group of organisms that are closely related and share similar characteristics