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प्रश्न
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
Dry seeds when submerged in water swell up due to endosmosis.
विकल्प
True
False
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उत्तर
False.
Dry seeds when submerged in water swell up due to imbibitions. On contact with water dry seeds imbibe water and swell up.
संबंधित प्रश्न
Choose the correct answer:
Absorption of water from soil takes place by __________
Study the experimental setup in the figure and then answer the question that follow.
What is meant by 'semipermeable 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. |
Multiple Choice Question:
Water will be absorbed by the root hairs when:
________ type of tissues are present in epiphytic roots.
What is the composition of an outer layer of root hair?
Epiphytic plants like orchids absorb water vapours from air with the help of epiphytic roots having special tissue called ____________.
____________plants like orchids absorb water vapours from air with the help of epiphytic roots having special tissue called velamen.
How many regions are there in a typical root?
