Which compound is a reactant of both cellular respiration and dehydration synthesis? (1 point) O glucose
O oxygen
O water
O ATP

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.

As a small change in a person's dna can cause a genetic disorder

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone