Althium atom that has lost an electron comes near a chlorine atom that has gained an electrron. what happens

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.

Ascientific idea becomes valid when it is what?

What are the three different shapes or structures shapes or structure of carbon-based molecules?