<u>Answer</u>
Polypeptides
Polypeptides are polymers of amino acids that are linked in linear chains and that contain atoms of nitrogen.
Answer: D) Motor neuron
Explanation: The sympathetic nervous system prepares the body for situations that require alertness or strength, such as situations that arouse fear, anger, emotion, or shame ("fight or flight" situations). In this type of situation, the sympathetic nervous system stimulates the heart muscles to increase the heart rate, dilates the bronchial tubes of the lungs (increases oxygen retention) and causes the dilation of blood vessels that supply the heart and skeletal muscles (increasing the blood supply).
<span>C.) Factories reusing cooling water instead of returning it to a river
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To describe the process whereby bacteria on the teeth metabolize carbohydrates producing tooth-damaging acids is used the term tooth (or dental) decay. It is a tooth demineralization process that occurs when a tooth is exposed to an acidic environment of pH 5.5 and below. The primary food source for cariogenic (cavity-causing) bacteria is dietary sugars.Suggestion is to b<span>rush and floss promptly after eating so to insure that dental plaque is not present on your teeth.</span>