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प्रश्न
Choose the correct answer:
An example of a selective permeable membrane is __________
विकल्प
cell wall
mitochondrial membrane
chloroplast membrane
plasmalemma
उत्तर
An example of a selective permeable membrane is plasmalemma
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संबंधित प्रश्न
Explain the mechanism of closing and opening of the stomata.
What part is played by The cytoplasm in the uptake of water into the root hair?
Choose the correct answer:
In ascent of sap water reaches upwards ____________
Choose the correct answer:
The water is translocated upwards from the roots through _____________
Given below is an experimental demonstration.
(i) Which phenomenon has been demonstrated in the given figure?
(ii) What is the solute and what is solvent in the above experiment?
(iii) Define the phenomenon in Q. (i) above.
(iv) Give one example from your daily life experiences based on this principle.
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:
The most widely accepted theory for ascent of sap is ______.
What is the composition of inner layer of root hair?
Draw a neat and labelled diagram of the Root tip showing the root hair zone.
Draw a neat and labelled diagram of Root hair.
