The largest reservoir of carbon is in the ocean
It would be a plant cell. Only plant cells have cell walls and chloroplasts.
The tricuspid valve, located between the right atrium and the right ventricle; the pulmonary (pulmonic) valve, between the right ventricle and the pulmonary artery; the mitral valve, between the left atrium and left ventricle; and. the aortic valve, between the left ventricle and the aorta.
There are a variety of eubacteria living as decomposers, heterotrophs, pathogens, and autotrophs.