Home
Class 12
BIOLOGY
Callase enzyme which dissolved callose o...

Callase enzyme which dissolved callose of pollen tetrads to separate four pollends is provided by

A

pollens

B

tapetum

C

middle layers

D

endothecium

Text Solution

Verified by Experts

The correct Answer is:
B
Tapetum secretes Ubisch bodies which get covered with sporopollenin and so increase thickness of exine of pollen grain wall. Tapetum provides nourishment to developing microspores. It also secretes callase enzyme which dissolves callose substances by which four pollens of a pollen tetrad are united, hence sparating microspores or pollens of a tetrad.
Promotional Banner

Topper's Solved these Questions

  • REPRODUCTIVE HEALTH

    NCERT FINGERTIPS|Exercise Reproductive Health|133 Videos

  • STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

    NCERT FINGERTIPS|Exercise Strategies For Enhancement In Food Production|151 Videos

Similar Questions

Explore conceptually related problems

Which enzyme dissolves blood clots in the coronary artery?

Name four animals which provide us food.

Which of the following provides the enzyme required to dissolve the callose plugs of pollen tetrads ?

One of the effects of Gibberellins is to induce the synthesis of amylase enzyme which causes the break down of starch and provides nourishment to the embryo in the seed. This phenomenon leads to the germination of seed. The hormone antagonist to this phenomenon is

The figure given below shows the conversion of a substrate into product by an enzyme. In which one of the four options (a-d) the components of reaction labelled as A, B, C and D are identified correctly

A solid substance is dissolved in water. Which one of the following methods is used to separate it?

NCERT FINGERTIPS-SEXUAL REPRODUCTION IN FLOWERING PLANTS-Sexual Reproduction In Flowering Plants
  1. The function of labelled part X is

    Text Solution

    |

  2. Which of the following statements regarding the sturcture of microspor...

    Text Solution

    |

  3. Callase enzyme which dissolved callose of pollen tetrads to separate f...

    Text Solution

    |

  4. Which function of tapetum is correct?

    Text Solution

    |

  5. In angiosperms various stages of reductional division can best be stud...

    Text Solution

    |

  6. Study of pollen grains is called

    Text Solution

    |

  7. Several pollen grains form a unit designated as pollinium in Family

    Text Solution

    |

  8. The given figure represents

    Text Solution

    |

  9. How many pollen mother cells should undergo meiotic division to produc...

    Text Solution

    |

  10. How many meiotic divisions are required for the formation of 100 polle...

    Text Solution

    |

  11. One of the most resistant biological material present in the exine of ...

    Text Solution

    |

  12. Which of the following statements about sporopollenin is incorrect ?

    Text Solution

    |

  13. What is the function of germ pore?

    Text Solution

    |

  14. Read the given statements. (i) Outer exine is made up of sporopolle...

    Text Solution

    |

  15. of the pollen grain divides to form two male gametes.

    Text Solution

    |

  16. The three cells found in a pollen grain when it is shed at 3-celled st...

    Text Solution

    |

  17. In a fully developed male gametophyte the number of nuclei is

    Text Solution

    |

  18. Refer to the given figure of reproductive structure of Papaver and ide...

    Text Solution

    |

  19. Megasporangium along with its protective integuments is called

    Text Solution

    |

  20. A typical angiospermous ovule is attached to the placenta by means of ...

    Text Solution

    |