dna within the cell is wrapped around nucleosomes to form chromatin. when chromatin is in the form of a 30 nm fibril, how many copies of h1 and h2a histone proteins would be found in a stretch of chromatin containing 20 nucleosomes?

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a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.

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answer: b. nucleolus

explanation: nucleolus is a structure in the nucleus are ribosomes are made.

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: d

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: d