Answer:
C) the amount of energy available in the organisms at each level
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Explanation:
Digestion is of two types, mechanical and chemical. Food first enters the mouth where it is mechanically digested by the teeth and chemically digested by the enzymes in the saliva. Next, food travels to the pharynx and then the esophagus via peristaltic motion of the muscles. Then the food enters the stomach, where chemical digestion is completed. The broken down food is sent to the small intestine for absorption and then the large intestine to have water removed and then be expelled from the body.
So, the endoplasmic reticulum does many things, such as folding the protein molecules in sacs called cisternae. It also transports synthesized proteins in vesicles to the Golgi apparatus.
