35. Soil

Which type of organism is primarily responsible for converting atmospheric nitrogen (\(N_2\)) into a form usable by plants?

Which of the following statements correctly describes nitrogen and its role as a plant nutrient?

The most abundant gas in our atmosphere cannot be used by plants directly in its atmospheric form. Fortunately, this gas is made available to some plants by certain bacteria that live symbiotically in their roots. What is this gas?

Which of the following is primarily responsible for capturing atmospheric nitrogen (\(N_2\)) and converting it into a biologically usable form during nitrogen fixation?

Nitrogen fixation is carried out primarily by which of the following?

Which of these describes the initial interaction between Rhizobium and a soybean root?

In root nodules, the plants provide __________, and the bacteria provide __________.

Which of the following organisms can fix nitrogen?

Which of the following is true of mycorrhizae?