Why is a “ ring of life “ more appropriate to describe the relationships between archaea bacteria and eukaryotes than a “ tree of life “

the calvin cycle has three stages. in stage 1, the enzyme rubisco incorporates carbon dioxide into an organic molecule. in stage 2, the organic molecule is reduced. in stage 3, rubp, the molecule that starts the cycle, is regenerated so that the cycle can continue

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

the answer is c) an oak tree