Describe the movement of the tectonic plates in model C. What is this situation called?

Which of the following is the main purpose of a human community?

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.

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.