Here are her results:

Day 2: slight mark where the paper covered the leaf; it is a lighter green than the rest of the leaf.
Day 4: yellow circle where the construction paper was.
Day 7: almost white circle where the paper covered the leaf.
Using your knowledge of photosynthesis, which answer choice explains her results the best?
The part of the leaves that were covered with paper didn't allow for water to be absorbed. Without water,
• photosynthesis was unable to take place because the phloem was not able to bring the needed water molecules to the
roots.
•The part of the leaves that were covered with paper didn't get any light. Without light, cellular respiration was unable to take place because the mitochondria within the leaf cells were unable to absorb the ATP energy needed for the chemical reaction.
•The part of the leaves that were covered with paper didn't get any light. Without light, photosynthesis was unable to take place because the chlorophyll within the leaf cells were unable to absorb the sunlight energy needed for the chemical reaction.
The part of the leaves that were covered with paper didn't allow for gas exchange through the leaf's stomata. Without
• oxygen, photosynthesis was unable to take place because the needed reactant of oxygen was missing.

1 answer

The best answer choice that explains her results is:
- The part of the leaves that were covered with paper didn't get any light. Without light, photosynthesis was unable to take place because the chlorophyll within the leaf cells were unable to absorb the sunlight energy needed for the chemical reaction.