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प्रश्न
Given below is the figure of an experimental set up to demonstrate root pressure.
(i) Define root pressure.
(ii) What change would you observe in the water level after some time?
(iii) What role is being played by the root pressure in the given experiment?
(iv) Why the oil has been sprinkled on water?
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उत्तर
(i) The collective force exerted by the cortical cells of the root in forcing water upward into the xylem is known as root pressure.
(ii) The water level will rise in the glass tube.
(iii) Root pressure is forcing the water up in the stem.
(iv) To prevent evaporation of water from the tube.
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संबंधित प्रश्न
Give the appropriate biological or technical term for the following.
Movement of molecules of a substance from their higher concentration to lower concentration when they are in direct contact.
Osmosis and diffusion are the same except that osmosis there is:
Show by a series of diagrams, the change which a plant cell will undergo when placed in
Hypertonic salt solution
Give at least three uses of water to green plants
The diagram below represents an experimental set up to demonstrate a vital process. Study the same and then answer the questions that follow:
(i) Name the process.
(ii) Define the above named process.
(iii) What would you observe in the experimental setup after an hour or so?
(iv) What control experiment can be set up for the above experiment?
(v) Keeping in mind the root hair cell and its surrounding name the part that corresponds to (1) Concentrated sugar solution, (2) Parchment paper, (3) Water in the beaker.
(vi) Name any other substance that can be used instead of parchment paper in the above experiment.
(vii) Mention two advantages of this process to the plant.
Name the following:
The pressure through which water can rise upto some feet.
Fill in the Blanks
Diffusion is the movement of molecules from a region of their ________ concentration to the region of their ________ concentration.
Multiple Choice Question:
In the process of osmosis in a cell:
During a practical exam, a plant cell in a particular solution was placed under a compound microscope. Students were told to observe the cell and name the tonicity of the solution and mention the process that occurred in the cell.
