Why is finding the exact concentration of starch more accurate than recording whether starch was present every 30 seconds QUICKK!!!

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.

9. wind power creates pollution. water air soil noise

Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into