Which of the following are nitrogen-fixing plants? 1. Alfalfa 2. Amaranth 3. Chickpea 4. Clover 5. Purslane (Kulfa) 6. Spinach Select the correct answer using the code given below:
Explanation
Out of the listed plants, the following are nitrogen-fixing plants: 1. Alfalfa 3. Chickpea 4. Clover These plants have a symbiotic relationship with bacteria called rhizobia. The bacteria colonize nodules in the plant's roots and fix atmospheric nitrogen into a usable form (nitrates) that the plant can absorb.
The other options are not nitrogen-fixing plants: 2. Amaranth 5. Purslane (Kulfa) 6. Spinach These plants require nitrogen from the soil but cannot fix it themselves. They rely on soil nitrogen content or applied fertilizers. Remember: Purslane is a weed. If you would have known this piece of information, the question could have been easily solved by simple elimination.
Therefore, the correct answer is (1, 3, 4).