Natural selection means А individuals that fit best into their environment survive to pass on their genes while individuals that are less fit die out. B Scientists can changes the genes of an animal with genetic engineering. C Parents can select which traits they pass to their offspring. D D Mutations in DNA do not happen in nature.​

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.

2%? i tried finding the exact sorry if it's not 100% correct ; -;

the electromagnetic energy from the sun arrives in the form of visible and invisible light.