The production of insulin is a mechanism that regulates the human body's internal environment and aids in a:   the maintenance of homeostasis within the body system. b:   the production of carbon dioxide through cellular respiration. c:   the production of sugar molecules through photosynthesis. d:   the storage of genetic information within cells.

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.

Aboy with an extra x chromosome probably has which of the following syndromes?

What best describes the structure of the declaration of independence?