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प्रश्न
Choose the correct answer:
Which one is semi-permeable?
पर्याय
Plasmalemma
Cell wall
Endoplasmic reticulum
Golgi body
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उत्तर
Plasmalemma
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संबंधित प्रश्न
What are root hair? Mention the function performed by the root hair.
Name the following:
The process by which water enters root hairs.
Match the items in column I with those in column II
| Column I | Column II | ||
| (a) | Xylem | (i) | semi - permeable |
| (b) | Phloem | (ii) | permeable |
| (c) | Cell membrane | (iii) | downward flow of sap |
| (d) | Root pressure | (iv) | upward flow of water |
| (e) | Cell wall | (v) | guttation |
The diagram below represents a layer of epidermal cells showing a fully grown root hair. Study the diagram and answer the questions that follow:
Draw a diagram of the above root hair cell as it would appear when a concentrated solution of fertilizers is added near it.
Draw a diagram of the root hair cell as it would appear when a concentrated solution of fertilizers is added near it.
A thin strip of epidermal cells from the fleshy scales of an onion bulb was examined in a drop of water, under a microscope. All the epidermal cells looked alike and the figure alongside represents one of them. The thin strip was then transferred to a drop of strong sugar solution and re-examined under the microscope after about five minutes.
(i) Make a sketch of one of the epidermal cells, as it might appear after immersion in a strong sugar solution. Label any two parts which have undergone a change.
(ii) Give the scientific term for the change shown in Q.(i) above.
(iii) What would you do to bring this cell back to its original condition?
(iv) Give the scientific term used for the recovery of the cell as a result of the step taken in Q.(iii) above.
Fill in the Blank
Leaves get wilted if _________ is removed from the plant.
Describe structure of root hair.
What is the composition of an outer layer of root hair?
Which plant does tissue transport water and minerals from the roots to the leaf?
