Which statement correctly compares nucleic acids and carbohydrates?
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they both contain phosphorus, but only nucleic acids contain hydrogen
they both contain carbon, hydrogen, and oxygen in a 1: 2: 1 ratio.
o they both contain carbon, but only carbohydrates contain oxygen.
o they both contain carbon, but only nucleic acids contain phosphorous
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The correct answer is They both contain carbon ,but only nucleic acid contain phosphorous

Explanation:

Carbohydrates are also called polyhydroxyaldehydes or polyhydroxyketones.Carbohydrates contain carbon,hydrogen and oxygen.For example glucose(C6H12O6).

   On the other hand nucleic are composed of nucleotides that contain nitrogen base,ribose sugar and phosphate group.

     The presence of phosphate group in the nucleic acid make it different from carbohydrate.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely