According to epstein (2016), heterosexuallity and homosexuallity are best thought of as: a. orthogonal dimensions b. opposite ends of a continuum c. meaningless labels d. discrete categories

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.

Identify the composition of oceanic and continental crystal rocks.in a model of earth’s interior,where would these rocks appear?

In "the man in the water," what was the remarkable occurrence that rosenblatt reported?