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Give reason for the following: A plant cell, when kept in a hypertonic salt solution for about 30 minutes, turns flaccid.

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प्रश्न

Give reason for the following:

A plant cell, when kept in a hypertonic salt solution for about 30 minutes, turns flaccid.

संक्षेप में उत्तर
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उत्तर

In a hypertonic solution, the solution outside the cell has a higher solute concentration than the fluids inside the cell. Therefore, water flows out of the plant cell due to exosmosis. The cytoplasm shrinks, the plasma membrane withdraws away from the cell wall and the cell becomes flaccid. Hence, a plant cell, when kept in a hypertonic salt solution for about 30 minutes, turns flaccid.

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अध्याय 4: Absorption by roots: The Processes Involved - Review Questions [पृष्ठ ५३]

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सेलिना Concise Biology [English] Class 10 ICSE
अध्याय 4 Absorption by roots: The Processes Involved
Review Questions | Q D. 3. (d) | पृष्ठ ५३

संबंधित प्रश्न

The diagram given below represents a plant cell after being placed in a strong sugar solution. Study the diagram and answer the questions that follow: 

  1. What is the state of the cell shown in the diagram?
  2. Name the structure that acts as a selectively permeable membrane.
  3. Label the parts numbered 1 to 4 in the diagram.
  4. How can the above cell be brought back to its original condition? Mention the scientific term for the recovery of the cell.
  5. State any two features of the above plant cell which is not present in animal cells.

Explain Turgor pressure


Give scientific reasons : Balsam plants wilt during mid-day even if the soil is well watered.


Differentiate between the following:
Turgor pressure and wall pressure 


 Give suitable biological reasons for the following statement: 
Root hairs become flaccid and droop when excess fertilizers are added to the moist soil around them. 


Mention whether the following statement is true (T) or false (F) and give an explanation in support of your answer.

Soaked seeds burst into three seed coats.


Differentiate between:
Turgid and Flaccid.


Excessive use of fertilisers in agricultural fields reduces the yield of crops. Justify the statement.


When the cells of a plant are fully distended, the condition is called ______.


The figure given below is a diagrammatic representation of a part of the cross-section of the root in the root hair zone. Study the same and then answer the questions that follow:

  1. The parts labelled as 1, 2, 3 and 4 are:
    1. Root hair, Xylem vessel, Soil particles, Cortex respectively.
    2. Xylem vessel, Soil particles, Root hair, Cortex respectively.
    3. Root hair, Xylem vessel, Cortex, Soil particles respectively.
    4. Cortex, Soil particles, Xylem vessel, Root hair respectively.
  2. The process that enables the passage of water from soil into the root hair is:
    1. Diffusion
    2. Active transport
    3. Osmosis
    4. Passive absorption
  3. The kind of force which exists between a liquid and any surface is called as:
    1. Cohesive force
    2. Adhesive force
    3. Capillarity
    4. Suction force
  4. The kind of force between the same kind of liquid molecules is:
    1. Capillary force
    2. Transpirational pull
    3. Adhesive force
    4. Cohesive force
  5. Sometimes exudation of water occurs from the margin of the leaves in the early morning or night. It is termed as:
    1. Transpiration
    2. Guttation
    3. Bleeding
    4. Osmosis

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