Multiple choice

Which of the following bacteria helps to fix the atmospheric nitrogen in the root nodules of leguminous plants?

  1. Rhizobium

  2. Rhizopus

  3. E.Coli

  4. Mucor
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A Correct answer
Explanation

Rhizobium is a nitrogen-fixing bacteria that forms symbiotic relationship with leguminous plants, living in their root nodules and converting atmospheric nitrogen into ammonia that plants can use. Rhizopus is a fungus, E.Coli is a gut bacteria, and Mucor is also a fungus - none of these fix atmospheric nitrogen.

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