Biological Nitrogen Fixation (BNF) Is Inhibited by Oxygen

question 26

Multiple Choice

Biological nitrogen fixation (BNF) is inhibited by oxygen. Which of the following statements is NOT correct?

• A) Nitrogen fixation is ubiquitous in soil and water.
• B) Cyanobacteria are among the significant prokaryotic nitrogen fixers.
• C) BNF was the major source of fixed N before the Industrial Revolution.
• D) Only anaerobes fix dinitrogen on land.
• E) A wide diversity of prokaryotes use the same enzyme-nitrogenase for nitrogen fixation.

Grasp the visual pathway from the photoreceptors to the brain.

Understand lateral inhibition and its effects on visual perception.

Explain the function of the lens in the eye.

Comprehend the principles behind color vision and brightness contrast.

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