What is different about the mouth structure of ruminants compared to that of humans?

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.

Did you know that a blue wales tongue weighs more than an elephant?

Which locations on the map are low-pressure areas? a b c d e