It would be the start up of iron. Causing it to be a reactant and spread it across.
Insertion or

of genes to produce desired proteins.
Hey again,
The answer you are looking for is B).
Just as proteins consist of long chains of amino acids, DNA and RNA consists of nucleic acid chains called nucleotide's. Nucleotide's are composed of three units: base, sugar (monosaccharide) and phosphate. Bases are found in both DNA and RNA. As seen below, they are adenine, cytosine, guanine, thymine, and uracil.
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Answer: I belevs it is d hope this helps
Explanation: