Answer:
Hydrochloric acid contributes to protein digestion by supplying H+ which activates pepsinogen, the precursor to pepsin. Pepsinogen is secreted by chief cells in the gastric glands of the body and antrum of the stomach.
Explanation:
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Answer:
This concept is called the theory of plate tectonics.
Explanation:
An animal cell will only have a cell membrane, a plant cell will have a cell membrane and a cell wall