What marine province contains deep ocean trenches that form along convergent plate boundaries as a result of subduction? A. Abyssal plain
B. Deep ocean basin
C. Mid-ocean ridge
D. Continental margin

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.

How does a lytic infection differ from a lysogenic infection?

Regarding most of the narrator’s story, which word best describes the tone?