The stinging cells or nematocysts are characteristic of

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.

Where are the strongest jet streams located?

The solution inside a plant cell is approximately a 1% saline solution and a 21% nacl solution the ,cytoplasm of a plant cell will