The two steps in photosynthesis shown in the model are called the light-dependent reactions (chloroplast becomes excited) and the light-independent reactions (chloroplast returns to an unexcited state). 1. Do your observations confirm that the first step requires light and the second does not?​

videntify 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.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.