Biological fixation of nitrogen occurs most commonly in which of the following crops ?
Biological fixation of nitrogen occurs most commonly in which of the following crops ?
APulses
BRice
CWheat
DNone of these
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correct answer is: a: Pulses
Explanation: Biological nitrogen fixation occurs in plants that have symbiotic relationships with nitrogen-fixing bacteria, such as Rhizobia. These bacteria live in root nodules of legumes (pulses) like beans and lentils, converting atmospheric nitrogen into a usable form for the plant. This process is most common in pulses, not cereals like rice or wheat.
- OPTION a: Pulses
- Correct, as pulses are legumes that fix nitrogen through root nodules.- OPTION b: Rice
- Incorrect, rice does not have nitrogen-fixing nodules.- OPTION c: Wheat
- Incorrect, wheat lacks the symbiotic bacteria for nitrogen fixation.- OPTION d: None of these
- Incorrect, pulses are correct.
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