Latitude and Longitude are expressed using: A. a pair of degree coordinates
B. the specification of North or South
C. the specification of East or West
D. all of the above

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.

Which is required for sexual fissiondiploid cell productionmeiosis

What is the following best defines climate?