Multiple choice

Which of the following atmospheric gases is fixed by Rhizobium?

  1. Carbon dioxide

  2. Oxygen

  3. Nitrogen

  4. Hydrogen

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nitrogen is a gas that cannot be directly used by plants. Rhizobium is bacteria present in root nodules of leguminous plants that converts the atmospheric nitrogen into nitrogen salts to be used in soluble form.