Which noncoding rna coats the inactive x-chromosome in regions of heterochromatin?

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.

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

What organ systems are working to you cool down after a workout?