Home
Class 12
BIOLOGY
The exine of a pollen grain is composed ...

The exine of a pollen grain is composed of one of the most resistant biological matieral by which pollen grains are able to withstand extremes of temperature and dessication and cannot be degraded by any enzyme is

A

lignocellulose

B

sporopollenin

C

cellulose and lignin

D

pectin and cellulose

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • RESPIRATION IN PLANTS

    TRUEMAN BIOLOGY|Exercise MULTIPLE CHOICE QUESTIONS|191 Videos

  • STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

    TRUEMAN BIOLOGY|Exercise MCQ|218 Videos

Similar Questions

Explore conceptually related problems

Exine of pollen grains is composed of

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

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

The exine of pollen grains (microspores) is composed of

An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is

Most resistance biological material is Or An organic substance that can withstand enviornmental extremes and cannot be degraded by any enzyme is

At which stage, the pollen grains are liberated in the most angiosperms?

TRUEMAN BIOLOGY-SEXUAL REPRODUCTION IN FLOWERING PLANTS-MULTIPLE CHOICE QUESTIONS
  1. In dicots, at how many places exine is absent in the pollen grain ?

    Text Solution

    |

  2. Which one is larger nucleus in pollen grain ?

    Text Solution

    |

  3. The exine of a pollen grain is composed of one of the most resistant ...

    Text Solution

    |

  4. Genotypically the pollen grain proudcedin side the anther belong to

    Text Solution

    |

  5. Germ pore is the area where exine is

    Text Solution

    |

  6. A plant root has 16 chromosomes , so

    Text Solution

    |

  7. Sculpturing of exine of pollen is important in

    Text Solution

    |

  8. Ovule is technically equivalent to

    Text Solution

    |

  9. Ovule is attached to the placenta by a stalk known as

    Text Solution

    |

  10. Collar like outgrowth arising from the base of ovule and forming is a ...

    Text Solution

    |

  11. In tenuinucellate type of ovule

    Text Solution

    |

  12. Crassinucellate ovule shows:

    Text Solution

    |

  13. When ovule is straight with funiculus, embryo sac, chalaza and microp...

    Text Solution

    |

  14. Ovule is inverted (resupinates at 180^(@)) with body fused to funicle,...

    Text Solution

    |

  15. Ovule of Opuntia is coiled and turn at more kthan 360^(@) angle, i...

    Text Solution

    |

  16. Female gametophyte (megagametophyte of angiosperms) is represented ...

    Text Solution

    |

  17. The female gametophyte (embryo sac( of a typical dicot (Polygonum) at...

    Text Solution

    |

  18. Number of chromosomes is 24 in nucellus. Number of chromosomes in micr...

    Text Solution

    |

  19. Base of nucellus from which integument arises is

    Text Solution

    |

  20. The megasporangium of the angiosperms on maturation gives rise to

    Text Solution

    |