Why is it necessary to put a paper through peer review before it is published?

The ocean layer of a rapid temperature change with deph is known as the

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.

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water