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Given one difference between each of the following:
Active absorption and Passive absorption.
| Active absorption | Passive absorption |
| Movement against the concentration gradient | Movement along the concentration gradient |
| Expenditure of energy is required | No metabolic energy is required |
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Explain what would happen if:
Excess fertilizers are added to soil.
If excess fertilizer is added to the soil then the soil will become hypertonic as compared to the cell sap of the roots of the plant. Thus, the water will flow out of the roots through the process of exosmosis. The roots will become plasmolysed and excessive loss of water may kill the plants.
Explain what would happen if:
Silicon emulsion is applied over the surface of leaves.
Silicon emulsion applied over the surface of leaves reduces transpiration.
Mention the most significant function of the following:
Guard cells
Guard cells : Helps in opening and closing of stomata.
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Mock Test Series
