Home
Class 11
BIOLOGY
When a freshly collected spirogyra filam...

When a freshly collected spirogyra filament is kept in a 10% potassium nitrate solution, it is observed that the protoplasm shrinks in size
(a) What is this phenomenon called ?
(b) What will happen if the filament is replaced in distilled water ?

Text Solution

Verified by Experts

(a) The name of the process is plasmolysis which is seen in spirogyra. When fibres are put in 10% potassium Nitrate solution then water enters to outer cellular liquid from cell. So protoplasm shrinks.
(b) When we put fibres in distilled water then spirogyra regions its original state because water enters into cell, it is called plasmolysis.
Promotional Banner

Topper's Solved these Questions

  • TRANSPORT IN PLANTS

    KUMAR PRAKASHAN|Exercise Section-E NCERT Exemplar (Long Answer)|7 Videos

  • TRANSPORT IN PLANTS

    KUMAR PRAKASHAN|Exercise Questions from Module (Question Paper )|9 Videos

  • TRANSPORT IN PLANTS

    KUMAR PRAKASHAN|Exercise Section-E NCERT Exemplar (Very Short Answer)|23 Videos

  • THE LIVING WORLD

    KUMAR PRAKASHAN|Exercise OBJECTIVE SECTION (FILL IN BLANKS)|9 Videos

Similar Questions

Explore conceptually related problems

(a) With the help of well-labelled diagrams, describe the process of plasmolysis in plants, giving appropriate examples. (b) Explain what will happen to a plant cell if it is kept in a solution having higher water potential.

An onion peel was taken and (a) placed in salt solution for five minutes. (b) after that it was placed in distilled water. When seen under the microscope what would be observed in (a) and (b) ?

The Ka of propionic acid is 1.34 xx 10^(-5) . What is the pH of a solution containing 0.5 M propionic and 0.5 M sodium proportionate ? What happens to the pH of the solution when volume is doubled by adding water ?

Two coils of insulated copper wire are wound over a non - conducing cylinder as shown in figure 13.28. Coil 1 has larger number of turns . (1) Write your observation when , (a) plug key k is colsed and (b) plug key k is opend . (2) Give reason for your observation . (3) Mention the name of the phenomenon involved and define it . (4) Write the names of two coils used in this experiment . OR What are these coils called ?

Answer the following questions based on the P - T phase diagram of CO_(2) : (a) CO_(2) at 1 atm pressure and temperature -60^(@)C is compressed isothermally. Does it go through a liquid phase ? (b) What happens when CO_(2) at 4 atm pressure is cooled from room temperature at constant pressure ? (c) Describe qualitatively the changes in a given mass of solid CO_(2) at 10 atm pressure and temperature -65^(@)C as it is heated up to room temperature at constant pressure. (d) CO_(2) is heated to a temperature 70^(@)C and compressed isothermally. What changes in its properties do you expect to observe ?

KUMAR PRAKASHAN-TRANSPORT IN PLANTS -Section-E NCERT Exemplar (Short Answer)
  1. Water is indispensable for life. What properties of water make it usef...

    Text Solution

    |

  2. How is it that the intracellular levels of K^+ are higher than extrace...

    Text Solution

    |

  3. Cut pieces of beetroot do not leave the colour in cold water but do so...

    Text Solution

    |

  4. In a girdled plant, when water is supplied to the leaves above the gir...

    Text Solution

    |

  5. Various types of transport mechanisms are needed to fulfil the mineral...

    Text Solution

    |

  6. How can plants be grown under limited water supply without compromisin...

    Text Solution

    |

  7. Will the ascent of sap be possible without the cohesion and adhesion o...

    Text Solution

    |

  8. Keep some freshly cut flowers in a solution of food colour. Wait for s...

    Text Solution

    |

  9. When a freshly collected spirogyra filament is kept in a 10% potassium...

    Text Solution

    |

  10. Sugar crystals do not dissolve easily in ice cold water. Explain.

    Text Solution

    |

  11. Salt is applied to tennis lawns to kill weeds. How does salting tennis...

    Text Solution

    |

  12. What is the chemical composition of xylem and phloem sap ?

    Text Solution

    |

  13. If you are provided with two tubes (A and B), where one is narrow and ...

    Text Solution

    |

  14. What are 'aquaporins' ? How does presence of aquaporins affect osmosis...

    Text Solution

    |

  15. ABA (Abscisic Acid) is called a stress hormone. (a) How does this ...

    Text Solution

    |

  16. We know that plants are harmed by excess water. But plants survive und...

    Text Solution

    |

  17. How is facilitated diffusion different from diffusion ?

    Text Solution

    |

  18. Explain pressure flow hypothesis of translocation of sugar in plants.

    Text Solution

    |

  19. Observe the diagram and answer the following. (a) Are these type...

    Text Solution

    |

  20. Define : Uniport .

    Text Solution

    |