Which of the following plant nutrients is supplied from air?
Carbon
Plants need 16 essential nutrients. Of these, only carbon, hydrogen and oxygen are non-mineral nutrients, and carbon is taken directly from the air as carbon dioxide (CO2).
During photosynthesis, leaves absorb atmospheric CO2 through the stomata, and the carbon in it is fixed into glucose and other organic compounds. This makes carbon the plant nutrient that is supplied from the air.
Iron is a micronutrient absorbed from the soil by the roots, not from the air. Nitrogen, although abundant in the atmosphere as N2, cannot be used directly by most plants; they take it up from the soil as nitrate or ammonium ions (after nitrogen fixation), so it is treated as a soil-supplied nutrient. Hydrogen is obtained from water (H2O) absorbed by the roots, not from the air.
Similar Questions
Which of the following statements is/are correct regarding vegetative propagation?
Statement A: Root, stem and leaves develop into new plants under appropriate conditions.
Statement B: Vegetative propagation is used in sugarcane, roses and grapes.
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Important Questions from Botany
Which of the following is a type of nutrition?
I. Heterotrophic
II. Autotrophic
Fungi are always
Which of the following does NOT form an essential part of the process of photosynthesis?
Organisms that generate energy using light are:
Amarbel ( Cuscuta ) is a
