Answer:
deoxyribose
Explanation:
A phosphate backbone is the portion of the DNA double helix that provides structural support to the molecule. DNA consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.
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B is the answer to the question
D i think again im not sure but thats what i think
Organisms must reproduce C. to continue the species.
If organisms don't procreate, it means that their species will disappear. So in order to prevent the disappearance of a species, organisms mate to produce new organisms.