b would be the answer sorry if its wrong.
DNA is composed of repeating structural units called nucleotide.
Ribose and Deoxyribose is the five carbon sugar found in DNA.
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From sunlight. If I am correct.
Answer:
5,730 years
Explanation:
isotope describes the amount of time that it takes half of the isotopes in a sample to decay. in the case of radiocarbon dating, the half life of carbon 14 is 5,730years