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.
Answer:
II. A soybean crop modified to posess herbicide resistance
III. A farm-raised pig engines to digest food more efficiently
Explanation:
The organisms listed have been modified
