Home
Class 12
BIOLOGY
State the significance of sporopollenin....

State the significance of sporopollenin.

Text Solution

Verified by Experts

The wall material sporopollenin is contributed by both pollen cytoplasm and tapetum . It is derived from carotenoids . It is resistant to physical and biological decomposition . It helps to withstand high temperature and is resistant to strong acid , alkali and enzyme action. Hence , it preserves the pollen for long periods in fossile deposits, and it also protects pollen for long periods in fossil deposits, and it also protects pollen during its journey from anther to stigma.
Promotional Banner

Topper's Solved these Questions

  • ASEXUAL AND SEXUAL REPRODUCTION IN PLANTS

    FULL MARKS|Exercise Additional Questions (5- Mark Questios)|6 Videos

  • ASEXUAL AND SEXUAL REPRODUCTION IN PLANTS

    FULL MARKS|Exercise Higher Order Thinking Skills (HOTs) Questions|9 Videos

  • ASEXUAL AND SEXUAL REPRODUCTION IN PLANTS

    FULL MARKS|Exercise Additional Questions (2- Mark Questios)|49 Videos

  • APPLICATIONS OF BIOTECHNOLOGY

    FULL MARKS|Exercise HIGHER ORDER THINKING SKILLS (HOTs) QUESTIONS|7 Videos

  • BIODIVERSITY AND ITS CONSERVATION

    FULL MARKS|Exercise Higher Order Thinking Skills (HOT) Questions|5 Videos

Similar Questions

Explore conceptually related problems

For a reaction A + B rarr C , the rate of the reaction is denoted (-dA)/(dt) or (-dB)/(dt) or (+dC)/(dt) . State the significance of plus and minus sign.

What is the significance of pollination?

Write the significance of plasmolysis.

What is sporopollenin?

What are the significances of transposons?

FULL MARKS-ASEXUAL AND SEXUAL REPRODUCTION IN PLANTS-Additional Questions (3- Mark Questios)
  1. Briefly explain about the types of tapetum.

    Text Solution

    |

  2. Enumerate the functions of tapetum.

    Text Solution

    |

  3. State the significance of sporopollenin.

    Text Solution

    |

  4. What do you know about bee pollen ?

    Text Solution

    |

  5. Write a short note on pollen kitt.

    Text Solution

    |

  6. Draw and label the structure of a mature embryo sac of angiosperms.

    Text Solution

    |

  7. How many synergid cells are there in an mature embryo sac . Mention an...

    Text Solution

    |

  8. A mature female gametophyte (embryo sac/egg apparatus) of angiosperms ...

    Text Solution

    |

  9. Differentiate between chasmogamy and cleistogamy.

    Text Solution

    |

  10. Geitonogamy is similar to autogamy . Justify the statement .

    Text Solution

    |

  11. Explain the Herkogamy mechanism with suitable examples

    Text Solution

    |

  12. Given a brief account on pollination process in Zea mays.

    Text Solution

    |

  13. Explain the role of water as a pollinating agent in Vallisneria spiral...

    Text Solution

    |

  14. Enumerate the characters of ornithophilous flowers.

    Text Solution

    |

  15. How the flowers of salvia are adoped for mellitophily?

    Text Solution

    |

  16. Write down the advantages and disadvantages of cross-pollination.

    Text Solution

    |

  17. Why pollination has to occur ?

    Text Solution

    |

  18. How the pollen germination and compatibility is regulated by stigma of...

    Text Solution

    |

  19. Give a brief account on solid style.

    Text Solution

    |

  20. Exaplain the types of entry of pollen tube into the ovule.

    Text Solution

    |