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Question
Name the following:
Root hairs are the extension of which cells.
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Solution
Epidermal cell
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RELATED QUESTIONS
Which one of the following is a characteristic NOT related with the suitability of the roots for absorbing water?
What part is played by The cytoplasm in the uptake of water into the root hair?
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.
Grapes shrink when immersed in a very strong sugar solution.” Explain.
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.
Give Technical Term for the following.
Phenomenon of absorption of water by surface attraction.
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. |
Trace the pathway followed by water molecules from the time it enters a plant root to the time it escapes into the atmosphere from a leaf.
Identify the zone in wbkh root hair occurs.
____________plants like orchids absorb water vapours from air with the help of epiphytic roots having special tissue called velamen.
