24. Which of the following statements about nucleic acids and nucleotides is true?
a. Nucleotides are chains of nucleic acids held together by bonds.
b. Nucleic acids are composed of subunits called nucleotides.
c. Nucleotides and nucleic acids are the same thing.
d. None of the above.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

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