Home
Class 12
BIOLOGY
Pollen grains are able to tolerate extre...

Pollen grains are able to tolerate extremes of temperature and desiccation because their exine consists of:

A

Cutin

B

Suberin

C

Sporopollenin

D

Callose

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • SEXUAL REORODUCTION IN FLOWERING PLANTS

    MBD PUBLICATION|Exercise QUESTION BANK|125 Videos

  • THE CELL

    MBD PUBLICATION|Exercise QUESTION BANK|135 Videos

Similar Questions

Explore conceptually related problems

The leaves of gymnosperms are well-adapted to withstand extremes of temperature, humidity and wind, because of which of the following features?

Assertion : Exine of a pollen grain is made up of sporopollenin which is resistant to high temperature, strong acid or alkali as well as enzymatic degradation. Reason : Sporopollenin is absent in the region of germ pores.

Name a prominent aperture in pollen grain exine.

Consider the following statements. (i) Polyspermy may bring about fertilisation of egg by more than one male nucleus or the supernumerary sperms may fertilise other components of embryo sac much as synergids or antipodals. (ii) In angiosperms, pollen tube is normally an unbranched structure which ususally persists after fertilisation. (iii) Intine is the inner, pectocellulosic layer of pollen grain wall which is destroyed during acetolysis. (iv) Exine layer of pollen grain comprises of an outer non-sculptured layer sexine and an inner sculptured layer tectum. Which of the following combinations of above given statements is correct ?

One of the most resistant biological material present in the exine of pollen grain is

Name the plant in which the pollen grains are not covered by exine.

Read the given statements. (i) Outer exine is made up of sporopollenin. (ii) Inner intine is pecto-cellulosic in nature (iii) Generative cell is bigger and contains abundant food reserve (iv) Vegetative cell is small and floats in the cytoplasm of the generative cell. Which of the given statements are not true regarding structure of pollen grain?

MBD PUBLICATION-SEXUAL REPRODUCTION IN FLOWERING PLANTS-QUESTION BANK
  1. Perisperm is:

    Text Solution

    |

  2. In a flowering plant, archesporium gives rise.to :

    Text Solution

    |

  3. Pollen grains are able to tolerate extremes of temperature and desicca...

    Text Solution

    |

  4. The plant part which consists of two generations one with in the other...

    Text Solution

    |

  5. Pollen tube usually enters the embryo sac :

    Text Solution

    |

  6. A plant root cell has 16 chromosomes thus:

    Text Solution

    |

  7. Which one of the following statements is correct ?

    Text Solution

    |

  8. When a diploid female plant is crossed with a tetraploid male, the plo...

    Text Solution

    |

  9. Which of the followiing represent the edible part of the fruit of litc...

    Text Solution

    |

  10. Pollen tube usually enters the embryo sac :

    Text Solution

    |

  11. Which one of the following represents an ovule , where the embryo sac ...

    Text Solution

    |

  12. Why is vivipary an undesirable character for annual crop Plants?

    Text Solution

    |

  13. In which pair both the plants can be vegetatively propagated by leaf p...

    Text Solution

    |

  14. In a, typeof apomixis known as adventive embryony, embryos, develop di...

    Text Solution

    |

  15. Double fertilization,involves:

    Text Solution

    |

  16. In some plants anthers and stigma grow and mature at same time. This p...

    Text Solution

    |

  17. For the formation of tetrasporic embryo sac, how many megaspore mother...

    Text Solution

    |

  18. Pollen 'sac in Cycas is called:

    Text Solution

    |

  19. Polygonum type of embryo sac is :

    Text Solution

    |

  20. In the angiosperm ovule central cell of the , embryo sac, prior to the...

    Text Solution

    |