Amino acids are named after two of their functional groups: the amino group (NH2), which acts like a base, and the carboxyl group (COOH), which acts like an acid. A third functional group, often called the R group, varies among the different types of amino acids. In alanine, the R group is a methyl group (CH3). In serine, the R group is a methyl alcohol (-CH2OH).

the answer to your question is slate

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

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the correct answer is anaphylaxis.

anaphylaxis is a condition caused by insect bites, foods, medications, manifested by tongue swelling, shortness of breath, vomiting, low blood pressure. it sometimes may occur without an obvious reason. it is treated with epinephrine injection.other tretments include antihistamines and steroids,