Imagine you are comparing the nutrient content of phloem sap from three plants: one with rhizobial root nodules, one with mycorrhizae, and one with neither (bare-root) . Which of the three phloem samples would you expect to have the HIGHEST phosphorus content?
A) Phloem sap from the mycorrhizae sample will have the most phosphorus.
B) Phloem sap from the bare-root sample will have the most phosphorus.
C) Phloem sap from the sample with root nodules will have the most phosphorus.
D) The amount of phosphorus in the nodulated and mycorrhizal samples will be higher than in the bare-root sample.
Correct Answer:
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