(Figure 17

Multiple Choice

(Figure 17.22) Researchers manipulated the number of species of mycorrhizal fungi living in the soil and measured the effects on plant biomass and phosphorus uptake. Their results are shown in the figure. Based on their results, the most likely way the extinction of mycorrhizal fungi species would affect the ecosystem is to

A) reduce plant growth.
B) increase plant growth.
C) reduce plant extinction.
D) increase plant extinction.