The gases that make up Earth's atmosphere are commonly referred to as air. What are the two most abundant gases in the atmosphere? nitrogen and oxygen water vapor and argon oxygen and carbon dioxide nitrogen and carbon dioxide

the backbone of the dna and rna compound is sugar phosphate.

identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.v

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.