Answer: A. Nitrogen
Explanation: Nucleic acids contain the same elements as proteins: carbon, hydrogen, oxygen, nitrogen; plus phosphorous (C, H, O, N, and P). Nucleic acids are very large macromolecules composed of repetitive units of the same building blocks, nucleotides, similar to a pearl necklace made of many pearls.
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Since one of two ( or both ) parents carry the CF gene found in chromosome 7, that can therefore leave the child suffering from Cystic Fibrosis.
Answer:
C
Explanation:
Dead zones are are areas of low oxygen or hypoxia. They are usually caused by nutrient pollution that leads to algae blooms, but there are other factors that contribute
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