Which of the following is an example of a beneficial mutation?

a.
a mutation causing uncontrolled cell division in human tissue cells
b.
a mutation inhibiting human immunodeficiency virus from entering the host cell
c.
a mutation resulting in partial or complete loss of chlorophyll pigments in plants
d.
a mutation resulting in a squirrel being born without ovaries

Idk

Explanation:lol

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.