Multiple choice

The leguminous plants (legumes or dals) are important in agriculture because they

  1. have a short life

  2. are disease-resistant

  3. help in nitrogen economy of the plant

  4. need very little water to grow

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

Leguminous plants have symbiotic relationships with Rhizobium bacteria in their root nodules, which convert atmospheric nitrogen into ammonia that plants can use. This nitrogen fixation reduces dependence on external fertilizers and improves soil nitrogen content for subsequent crops. The other options (short life, disease resistance, low water needs) are not universal characteristics of legumes.

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