3. Pimples and acne can occur because of the sebaceous glands. How does this happen? it thaton halin telattan

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

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9. the history of life on earth is recorded in