1.

Prepare and present a short note on the role of plants in maintaining the oxygen level.

Answer»

In the presence of sunlight, the chlorophyll present in plants forms glucose by combining CO2 and water. As a result of this reaction (photosynthesis), oxygen is liberated. This helps to maintain the oxygen level in the atmosphere.

6CO2 + 6H2O → C6H12O6 + 6O2



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