Explanation:
under what circumstance does a negative cell presents An antigen to another negative cell
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The best representation is "C. A cactus is moved from a sunny windowsill to a dark room..", because the cactus feed itself with photosyntesis.
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Answer: C.) Carbohydrates always consist of a five-carbon sugar, a nitrogenous base, and one or more phosphate groups and are used to store genetic information.
Explanation:
