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प्रश्न
What is toxicity ?
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उत्तर
It refers to the kind of external osmotic environment of a cell or it refers to the type of solution outside the cell.
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संबंधित प्रश्न
How does movement and absorption of water take place through the roots?
What part is played by the cell wall?
Choose the correct answer:
The water is translocated upwards from the roots through _____________
Differentiate between the following
Permeable and Semi-permeable membrane.
Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with a suitable idea given in Column ‘I’.
| Column I | Column II |
| (i) Diffusion | (a) The exit or flow of water from the cell to the outer environment. |
| (ii) Xylem | (b) The shrinkage of protoplasm when the cell is kept in a hypertonic solution. |
| (iii) Root pressure | (c) The tissue through which water and mineral salts move upward in a plant. |
| (iv) Isotonic solution | (d) Two solutions which have equal osmotic pressure. |
| (v) Exosmosis | (e) The process by which the molecules of perfume spread in the room when the bottle is open. |
| (vi) Osmosis | (f) The process by which roots absorb water from the soil. |
| (vii) Plasmolysis | (g) The pressure by which water rises up to some feet in a lofty tree. |
| (viii) Hypotonic solution | (h) The concentration of the solution when lower than that of the cell sap. |
Inner layer of root hair is made up of ______.
Water which is absorbed by roots is transported to aerial parts of the plant through ______
Which plant does tissue transport water and minerals from the roots to the leaf?
Aquatic animals like fish excrete their wastes in gaseous form as ______.
