Q48.
Which of the following are nitrogen-fixing plants? 1. Alfalfa 2. Amarnath 3. Chickpea 4. Clover 5. Purslane (Kulfa) 6. Spinach Select the correct answer using the code given below:
Answer
A
Explanation
Alfalfa (option 1) is a legume that provides substantial nitrogen through symbiotic N2 fixation. Chickpea (option 3) is an annual legume of the family Fabaceae — nitrogen-fixing. Clover (option 4) fixes nitrogen through a symbiotic relationship with Rhizobium bacteria in root nodules. Amaranth (option 2) is NOT a nitrogen-fixing plant. Purslane/Kulfa (option 5) is a succulent plant, NOT a nitrogen-fixer. Spinach (option 6) is a leafy green of family Amaranthaceae, NOT a nitrogen-fixing plant.