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प्रश्न
Choose the correct answer:
In ascent of sap water reaches upwards ____________
विकल्प
In the form of a solid column.
in the form of a fragile column.
to some places in the form of solid and to some places in liquid form.
none of the above.
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उत्तर
In ascent of sap water reaches upwards none of the above
APPEARS IN
संबंधित प्रश्न
Draw a magnified view of the root-hair, and describe, how it helps in the absorption of water from the soil.
The apparatus arranged alongside signifies an important process.
(i) Name the process.
(ii) Where does this process occur in plants?
(iii) What solution is placed inside the dialysis tubing?
(iv) What happens to the level of the solution in the capillary tube?
The diagram given below represents a plant cell after being placed in a strong sugar solution. Guidelines 1 to 5 indicate the following:
1. Strong sugar solution
2. Cell wall
3. Protoplasm
4. Large vacuole
5. Nucleus
Study the diagram and answer the questions that follow:
(i) What is the state of the cell shown in the diagram?
(ii) Name the structure which acts as a selectively permeable membrane.
(iii) If the cell had been placed in distilled water instead of strong sugar solution which feature would not have been present?
(iv) If the cell in the diagram possessed chloroplasts where would these be present?
(v) Name any one feature of this plant cell which is not present in animal cells.
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. |
Draw a neat and labelled diagram of the Root tip showing the root hair zone.
____________plants like orchids absorb water vapours from air with the help of epiphytic roots having special tissue called velamen.
Epiphytic plants like ____________ absorb water vapours from air with the help of epiphytic roots having special tissue called velamen.
Root hair is a cytoplasmic extension of ______.
Water in the root enters due to ______.
