6.Name at least 3 places (areas) that regularly test for BOD/COD. Why is it important for these tests

Blood made up of red and white blood cells work together to form

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 of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?