How are chunks of time in the geologic timeline organized?

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.

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems