When the atom is pulled away only slightly, so that it is still within the attraction curve on the graph, does it move in response to attractive or repulsive forces? my science class

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.

Monitor and apply fix up stratorgies

Coral have a symbiotic relationship with what in order to eat?