Question

The most unique feature of family Fabaceae is

• A. The roots have rhizobia to fix atmospheric nitrogen
• B. These are the only plants that have flowers with partially inferior ovary
• C. They have tap root system, but the roots are small
• D. None of the above

Answer 1

The correct option is A

The roots have rhizobia to fix atmospheric nitrogen

Plants of family Fabaceae have specialized structures termed nodules in their roots that house rhizobium - a nitrogen fixing bacteria . These bacteria are able to fix the nitrogen available in the air into an organic form that is usable for the plant.