Figure 36 15 on page 780 describes a study of the

Last updated: 5/16/2023

Figure 36 15 on page 780 describes a study of the interaction between legumes and the root nodules that house nitrogen fixing bacteria In the study the scientists let the plants germinate and start forming root nodules Then they grew the plants in hydroponic cultures The treatment groups were a hydroponic culture with all the essential nutrients including nitrogen and b hydroponic culture with all the essential nutrients except nitrogen Why did the scientists use these treatment groups O To prevent the plants from growing nodules To make sure they had roughly equal numbers of plants in each group To prevent the plants from learning which treatment group they were in To control for the difference in nodule growth that might be expected if the plant has enough nitrogen vs not enough nitrogen