An organism which must obtain its food from other organisms is called

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

Acell in the human nervous system whose primary function is to form myelin and the blood-brain barrier, respond to injury, remove debris, and enhance learning and memory is called a(n) cell.

How does photosynthesis show the conservation of mass and energy?