Why Is Nitrogen Fixation an Essential Process

question 27

Multiple Choice

Why is nitrogen fixation an essential process?

• A) Fixed nitrogen is often the limiting factor in plant growth.
• B) Nitrogen fixation can only be done by certain prokaryotes.
• C) Nitrogen- fixing capacity can be genetically engineered.
• D) Nitrogen fixation is very expensive in terms of metabolic energy.
• E) Nitrogen fixers are sometimes symbiotic with legumes.

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