RNA is mostly single-stranded; DNA is always double-stranded.
Explanation:
DNA stores the genetic information that codes for the way protein should be developed by the cell. Protein determines the trait (phenotype) of the cell/organism. RNA is used as an intermediary between DNA and proteins. RNA is made of ribonucleic acids while DNA is made of deoxyribonucleic acids.
B because it’s talking about the tree itself. Saying that it’s plants would divert it to a different plant. The cells of the wood is what makes the tree and is relevant to the question
