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प्रश्न
Give Reasons for the following.
Plants begin to die when the excess of soluble fertilizers are added to the soil?
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उत्तर
Excess application of soluble fertilizers in soil makes the soil solution hypertonic than cell sap, hence exosmosis takes place and plants begin to die.
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संबंधित प्रश्न
Give the equivalent terms for the following:
Pressure of the cell contents on the cell wall
Leaves of the sensitive plant wilt and droop down on a slight touch. What mechanism brings about this change?
The following diagram represents a plant cell after being placed in a strong sugar solution.
Guidelines 1 to 5 indicate the following
(1)Cell wall, (2) Strong sugar solution, (3) Protoplasm (4) Large vacuole, (5) Nucleus
(1)What is the state of the cell shown in the cell shown in the diagram?
(2)Name the structure which acts as a selectively permeable membrane.
(3)If the cell had been placed in distilled water instead of strong sugar solution, which feature would not have been seen?
(4)Name any one feature of this plant cell which is not present in an animal cell.
Distinguish between the following:
Hypotonic and Hypertonic solutions
Give Reasons for the following.
Freshwater fish cannot survive in seawater.
Differentiate between:
Osmosis and Diffusion
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?
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Cells that have lost their water content are said to be deplasmolysed.
Explain the term:
Plasmolysis
Define the following term:
Osmotic Pressure
