Answer:
DNA stores biological information in sequences of four bases of nucleic acid — adenine (A), thymine (T), cytosine (C) and guanine (G) — which are strung along ribbons of sugar- phosphate molecules in the shape of a double helix.
Explanation:
Humans would be the answer for this question
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Your answer is : B) Two
I think C since they share valence electrons
Delta waves that are characterized by deep sleep low frequency waves