Home
Class 12
BIOLOGY
(a) Draw a diagram of Pistil showing pol...

(a) Draw a diagram of Pistil showing pollen tube growth in angiosperm and label (i) Stigma, (ii) male gametes , (iii) micropyle and (iv) Ovule.
(b) Write the function of micropyle.

Text Solution

Verified by Experts

(a)

(b) Write the function of micropyle :
* It helps pollen tube to enter the ovule and then enters one of the synergids through the filiform apparatus.
Promotional Banner

Topper's Solved these Questions

  • XII BOARDS

    XII BOARDS PREVIOUS YEAR|Exercise SECTION-E|12 Videos

  • XII BOARDS

    XII BOARDS PREVIOUS YEAR|Exercise [OUTSIDE DELHI : SET-II] SECTION -A|2 Videos

  • XII BOARDS

    XII BOARDS PREVIOUS YEAR|Exercise OUTSIDE DELHI SET III|10 Videos

  • SAMPLE PAPER 2019

    XII BOARDS PREVIOUS YEAR|Exercise Section E Part B|3 Videos

Similar Questions

Explore conceptually related problems

a) Draw a L.S. of a pistil showing pollen tube entering the embryo-sac in an angiosperm and label any six parts other than stigma, and ovary. b) Write the changes a fertilized ovule undergoes within the ovary in an angiosperm plant.

(a) Draw a diagram of sectional view of human ovary and label (i) Primary follicle, (ii) Tertiary follicle, (iii) Graafian follicle and (iv) Corpus luteum.

Draw a vertical section of a maize grain and label (i) pericarp, (ii)scutellum, (iii)coleoptile, and (iv) radicle

(a) Draw a diagrammatic sectional view of a seminiferous tubule (enlarged) of human male and label (i) Spermatogenium, (ii) Sertoli cell, (iii) Primary spermatocyte. Write the function of each labelled part. (b) Differentiate between spermatogenesis and spermiogenesis.

(a) Draw a labelled diagram of the sectional view of microsporangium of an angiosperm. (b) Explain the development of male gametophyte in the microsporangium.

(a) Draw a diagrammatic sketch of a transverse section of an anther of an angiosperm . Label its different walls and the tissue forming microspore mother cells. (b) Describe the process of microsporogenesis upto the formation of a microspore. (c) Write the function of 'germ pore' in a pollen grain of an angiosperm.

Draw a longitudianl section of a pistil of an angiosperm showing the growth of the pollen tube up to the micropyle of the ovule. Label (i) stigma, (ii) embryo sac, (iii) polle tube (iv) micropyle.

XII BOARDS PREVIOUS YEAR-XII BOARDS-COMPTT
  1. Write the aim with which animal breeding programmes are carried. Descr...

    Text Solution

    |

  2. (a) Draw a diagram of sectional view of human ovary and label (i) Prim...

    Text Solution

    |

  3. (a) Draw a diagram of Pistil showing pollen tube growth in angiosperm...

    Text Solution

    |

  4. What was the challenge for production of insulin using rDNA techniques...

    Text Solution

    |

  5. Identify A, B, C, D, E and F in the table given below :

    Text Solution

    |

  6. Name the organism from which the 'cry' genes are isolated. Mention wit...

    Text Solution

    |

  7. Excessive and continous use of pesticides has resulted in evolution of...

    Text Solution

    |

  8. Explain with the help of two examples how certain plants have evolved ...

    Text Solution

    |

  9. What type of organs eye of an Octopus and that of a human called? Give...

    Text Solution

    |

  10. With the revolution in information technology, now it has become an in...

    Text Solution

    |

  11. (a) Explain the steps involved in in-vitro fertilisation popularly kno...

    Text Solution

    |

  12. (a) State one difference and one similarity between geitonogamy and ...

    Text Solution

    |

  13. (a) Hershey and Chase carried their experiment in three steps : infect...

    Text Solution

    |

  14. Taking an example of white-winged moths and dark-winged moths of Engla...

    Text Solution

    |

  15. (a) Write the percentage of land area that was covered by forests by t...

    Text Solution

    |

  16. (a) Comment on the pattern in which all communities undergo a change i...

    Text Solution

    |

  17. Name the condition in vertebrates where the body attacks self-cells.

    Text Solution

    |

  18. Write the function of a Bioreactor.

    Text Solution

    |

  19. A colour blind boy is born to a couple with a normal colour vision. Wr...

    Text Solution

    |

  20. Mention any two conditons that enhance the chances of syngamy in organ...

    Text Solution

    |