Please use the following information to answer the question(s) below.
A scientist conducts an experiment to quantify the effect of mycorrhizae and soil nitrogen levels on plant growth in a grassland. The experiment has four treatments: (1) Mycorrhizae present and ambient levels of nitrogen, (2) mycorrhizae present and nitrogen added, (3) mycorrhizae absent and ambient levels of nitrogen, and (3) mycorrhizae absent and nitrogen added. After four weeks, the scientist removes the aboveground plant material for weighing. Figure 42.4.
-What conclusion is best supported by Figure 42.4?

Question

Please use the following information to answer the question(s) below.
A scientist conducts an experiment to quantify the effect of mycorrhizae and soil nitrogen levels on plant growth in a grassland. The experiment has four treatments: (1) Mycorrhizae present and ambient levels of nitrogen, (2) mycorrhizae present and nitrogen added, (3) mycorrhizae absent and ambient levels of nitrogen, and (3) mycorrhizae absent and nitrogen added. After four weeks, the scientist removes the aboveground plant material for weighing.  Figure 42.4.
-What conclusion is best supported by Figure 42.4?

Quizplus · Accepted Answer

The graph shows that in both mycorrhizae present and absent treatments, adding nitrogen significantly increased aboveground biomass production compared to ambient nitrogen levels. However, the mycorrhizae present treatments have lower biomass production than the mycorrhizae absent treatments, indicating that mycorrhizae are not able to overcome the nitrogen limitation. Therefore, the best-supported conclusion is that in the ambient condition, plants are limited by nitrogen even when mycorrhizae are present.

Please Use the Following Information to Answer the Question(s) Below