What structural problem prevents adenine from pairing with guanine? a. the bases are both short. b. they lack phosphate groups. c. they lack the deoxyribose group. d. the bases are both long.

 D. The bases are both long.

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Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.

A- a reduction in biodiversity