The pine cone is most similar to a stem because both are used for support.

a stem because both are used for support.

a flower because both are used for reproduction.

a flower because both are used for reproduction.

roots because both collect nutrients for the plant.

roots because both collect nutrients for the plant.

leaves because both change sunlight into energy.

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.

what are the options