Describe the process and role of nitrogen fixation and root nodules

What will be an ideal response?


Legumes have root nodules that house bacteria that have enzyme systems that can convert atmospheric nitrogen gas (in aerated soil) to organic forms of nitrogen. The plant then can use these organic forms. The bacteria in root nodules are primarily cyanobacteria. A few other nonlegumes also have associations with bacteria that function in roughly the same manner.

Biology & Microbiology

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Which of the following will increase the loading of oxygen onto the hemoglobin molecule within the lungs?

A) decreased pH B) decreased hydrogen ion concentration C) increasedPCO2 D) increased 2,3-bisphosphoglycerate (2,3-BPG) E) increased body temperature

Biology & Microbiology

Refer to Figure 49-1. Which of the following would bind to an intracellular receptor?


a. 1
b. 3
c. 6
d. 8
e. 10

Biology & Microbiology

The "run" in bacterial motility is the result of (clockwise/counterclockwise/whiplike) rotation of the flagella

What will be an ideal response?

Biology & Microbiology

Which of the following would be considered a benefit of increased flexibility?

What will be an ideal response?

Biology & Microbiology