In a farm land, it is noticed that maize plants found amongst leguminous plants, were seen to grow more vigorously than in areas where the leguminous plants were absent. How can this be explained?

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49. In a farm land, it is noticed that maize plants found amongst leguminous plants, were seen to grow more vigorously than in areas where the leguminous plants were absent. How can this be explained?
Leguminous plants (like beans, peas, and clover) have a symbiotic relationship with nitrogen-fixing bacteria in their root nodules. These bacteria convert atmospheric nitrogen into a form usable by plants, enriching the soil with nitrogen compounds. Nitrogen is an essential nutrient for plant growth, leading to more vigorous growth in nearby plants like maize.

The correct option is C. The leguminous plants increase the nitrogen content of the soil.

50. The planting of more trees in an environment will cause:
Trees perform photosynthesis, a process that absorbs carbon dioxide from the atmosphere and releases oxygen. Therefore, planting more trees increases the overall production of oxygen in the environment.

The correct option is C. Production of more oxygen.