The values osmotic potential π and pressure potential ρ of cells A, B, C and D are given below:
| Cell | π | ρ |
|---|---|---|
| Cell A | –1.0 | 0.5 |
| Cell B | –0.6 | 0.3 |
| Cell C | –1.2 | 0.6 |
| Cell D | –0.8 | 0.4 |
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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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Hydathodes are also called |
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When pea seeds and wheat grains are soaked in water, pea seeds showed more swelling than the wheat. The reason is |
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A soil sample is found to have 25% of its volume occupied by soil water. Of this, 10% is hygroscopic water and .the remaining is capillary water. What is the field capacity of this soil? |
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When the concentration of the soil solutes is low, the absorption of water is |
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Which one of the followings establishes the barrier to the apoplastic movement of solutes into the vascular cylinder? |
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