jakails7532
12.08.2021 •
Biology
In order for a physical barrier to be effective in preventing infection, the barrier must . A. prevent the substance from entering the body, trap the substance when it first enters the body, or flush the substance out of the body B. destroy the substance before it enters the body, prevent the substance from reproducing, or flush the substance out of the body C. trap the substance in t
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Ответ:
a
Explanation:
Ответ:
supports life and is a supply of energy
Explanation: