Question

Plants absorb carbon dioxide from

• A. Millets
• B. Cereals
• C. Carbohydrates present in the soil
• D. Atomosphere

Answer 1

The correct option is D Atomosphere

Macronutrients are generally present in plant tissues in large amounts (in excess of 10 m mole Kg 1 of dry matter). The macronutrients include carbon, hydrogen, oxygen, nitrogen, phosphorous, sulphur, potassium, calcium and magnesium.

Of these, carbon, hydrogen and oxygen are mainly obtained from atmospheric $C{O}_2$ and $H_{2}O$ is absorbed from soil in liquid form, while the others are absorbed from the soil as mineral nutrition.