Living organisms release carbon dioxide as a product of photosynthesis
a. True
b. false

a. true

Explanation:

hope it will helpful to you

If you are talking about plants it is false because they release oxygen as a “waste” product from photosynthesis but if the question is referring to animals and human beings the answer would also be false because we do not undergo photosynthesis. Best bet is false

answer: "circumcision is a common procedure in which the skin covering the tip of the penis is surgically removed."

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.