Home
Class 10
BIOLOGY
Try this. Apparatus : Conical flask, gl...

Try this.
Apparatus `:` Conical flask, glass slides, cover slips,forceps, compound microscope, watch glass,etc.
Materials `:` A medium sized onion, iodine solution. etc.

Text Solution

Verified by Experts

Procedure`:` Take a medium sized onion. Keep it in a conical flask filled with water in such a way that the roots of onion will be incontact with water. Observe the roots of onion after 4-5 days. Cut the tips of some of the roots and put them in a watch glass. Pour some drops of iodine in watch glass.Take one of the root tipe on glass slide press it with the help of forceps. Add 1-2 drops of waterand carefully place cover slip over it in such a way that air will not be trapped between. Observe the preparedglass slip under the compound microscope. Which phase of celll division did you observe ? Sketch its figure.
Various phases of cell division occurring in root tips of onion are shown in figure.
Promotional Banner

Topper's Solved these Questions

  • LIFE PROCESSES IN LIVING ORGANISMS PART - 1

    TARGET PUBLICATION|Exercise CHAPTER ASSESSMENT|4 Videos
  • LIFE PROCESSES IN LIVING ORGANISMS PART - 1

    TARGET PUBLICATION|Exercise GIVEN SCIENTIFIC REASONS|2 Videos
  • LIFE PROCESSES IN LIVING ORGANISMS PART - 1

    TARGET PUBLICATION|Exercise QUESTIONS BASED ON PARAGRAPH|5 Videos
  • LIFE PROCESSES IN LIVING ORGANISM PART-2

    TARGET PUBLICATION|Exercise GIVE SCIENTIFIC REASONS|4 Videos

Similar Questions

Explore conceptually related problems

Bring ‘active dry yeast’ from the market. Mix a spoonful of yeast, two poonfuls sugar with «sufficient quantity of lukewarm water in a bottle. Fix a colourless, transparent balloon on the mouth of that bottle. Take a drop of the solution from the bottle on a glass slide, put a cover -slip over it and observe it under the compound microscope. Store the solution in the bottle carefully.

Collect different water samples of fresh water. Mount them on a glass slide and observe under a compound microscope. Try to identify the organisms which are visible under it.

Apparatus: Test tube, conical flask, balance, etc. Chemicals: Sodium chloride and silver nitrate. Procedure: i. Take sodium chloride solution in a conical flask and silver nitrate solution in a test tube. ii. Tie a thread to the test tube and insert it carefully into the conical flask. Make the conical flask air tight by fitting a rubber cork. iii. Weigh the conical flask with the help of a balance. iv. Now tilt the conical flask and mix the solution present in the test tube with the solution in the conical flask. v. Weigh the conical flask again. Did any insoluble substance form?

Activity 1 : Take a conical flask and collect the water in it from a pond having stagnent water and aquatic plants. Add some wheat grans and aquatic plants to it. Keep it for 3-4 days so that wheat grains and plants will decompose. Early in the morning on fourth day, take a glass slide and put a drop of that water over it. Carefully, put a cover-slip on that drop and observe under compound microscope.

Apparatus: Test tube, glass rod, beaker, Bunsen burner, etc. Chemicals: Hydrochloric acid, ammonia solution, magnesium strip, quick lime, etc. Activity 2: Hold a magnesium (Mg) strip in a pair of tongs and ignite. What will you observe?

Apparatus: Test tube, glass rod, beaker, Bunsen burner, etc. Chemicals: Hydrochloric acid, ammonia solution, magnesium strip, quick lime, etc. Activity 3: Take water in a beaker up to half of its capacity. Add a few pieces of quick lime (calcium oxide, CaO) to it. What will you observe?

Take a fresh and fleshy leaf of Rhoeo, lily or any other plant. Pull and press it, tearing it obliquely in such a way that its transparaent epidermis will be visible at the cut margins. Take the transparent epidermis with the forceps and keep it in dilute safranin solution for 1 minute. Spread it on a slide, cover it with a cover-slip and observe it under a compound microsope.

Apparatus: Two aluminium tins of the same size, two small galsses, water, thermometers, black paint, etc. : Procedure: Paint the outer surface of one tin black paint, and let it dry. Then in both tins, place one glass, each filled with water at the same temperature. cover the tins with lids. Keep them in the sun for two hours. Now measure the temperature of the water in the glasses in the two tins. What is the reason for the difference in the temperature?

Activity 2 : Bring the active dry yeast powder from market . Take 50ml lukewarm water in a conical flask. Add 5gm of active dry yeast powder and 10 gm table sugar to that water andmix the mixture well. Keep the flask in warm place and after an hour take a drop of that mixture on a clean glass slide. Put a cover-glass on that drop and observe it under the compound microscope.

Search for a pond with greenish water. Collect some of the green fibres from the water. Put the fibres in a petridish and wash them clean with water. Put one of the fibres in a drop of water on a glass slide and spread it out straight. Put a cover-slip over the slide and observe under a compound microscope.

TARGET PUBLICATION-LIFE PROCESSES IN LIVING ORGANISMS PART - 1 -CAN YOU RECALL?
  1. Oral rehydaration solution (salt-sugar-water) is frequently given to a...

    Text Solution

    |

  2. We sweat during summer and heavy exercise.

    Text Solution

    |

  3. Internet is my friend. Collect the information from internet about B...

    Text Solution

    |

  4. What do you mean by coenzymes ?

    Text Solution

    |

  5. Find the full forms of FAD, FMN, NAD,NADP

    Text Solution

    |

  6. How much quantity of each vitamin is required every day ?

    Text Solution

    |

  7. What happens to the cells of injured tissue ?

    Text Solution

    |

  8. Whether new cells are formed during healing of wound ?

    Text Solution

    |

  9. Do the plants get injured when we pluck the flowers ? How are those wo...

    Text Solution

    |

  10. How does the growth of any living organism occur? Does the number of c...

    Text Solution

    |

  11. Genetic variation is responsible for formation of new species from ear...

    Text Solution

    |

  12. What is the shape of chromosomes ? Give its names in the figure given...

    Text Solution

    |

  13. Try this. Apparatus : Conical flask, glass slides, cover slips,forcep...

    Text Solution

    |

  14. What do you mean by diploid cell?

    Text Solution

    |

  15. What do you mean by halpoid cell?

    Text Solution

    |

  16. Define the following: Homologous Chromosomes

    Text Solution

    |

  17. Whether the gametes are diploid or haploid? Why?

    Text Solution

    |

  18. Process by which four haploid cells are formed from on diploid cell.

    Text Solution

    |

  19. What is the importance of haploid cells?

    Text Solution

    |

  20. Project : With the help of information collected from internet, prep...

    Text Solution

    |