You fall backward and hit your head on a very sharp rock. The blow to your head causes you to lose consciousness and stop breathing. You most likely hit what part of your brain? A) cerebellum
B) frontal lobe
C) brainstem

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 are some characteristics of a free enterprise economy?

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water