what question could you ask about the component of two atoms to find out if the atoms are of the same element or of different elements?

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.

The deserts of the sahara and australia are associated with

Which type of neuroglia is found outside of the brain?