Which of the following is not a purpose of transpiration?
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When the conditions are dry, a grass leaf curls inward to minimize water loss due to presence of |
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Guard cells help in |
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Which one of the following denotes the water potential of the mesophyll cell in wilted condition? |
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Identify the correct relationship with reference to water potential of a plant cell. |
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The values osmotic potential π and pressure potential ρ of cells A, B, C and D are given below:
Identify the correct sequence that shows the path of movement of water from among the following: |
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Steroid hormones easily pass through the plasma membrane by simple diffusion because they |
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Assertion (A): K+ ion accumulation found in Nitella depends on its respiratory activity. Reason (R): Absorption of all ions in plants completely depends on the usage of metabolic energy. The correct answer is |
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Guttation is the result of |
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Humidity in atmosphere decreases rate of |
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Living cells placed in isotonic solution (0.9% saline) retain their size and shape. This is based on the concept of |
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