What are the processes that
turn a sedimentary rock
into a metamorphic rock?

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 conditions need to be in balance for cells to function? check all that apply. blood sugar food intake body water body temperature body mass

According to the cladogram, which organisms have roundworms as a common ancestor?