Home
Class 12
BIOLOGY
Assertion :- Pollen grains can withstand...

Assertion :- Pollen grains can withstand temperature and strong acids and alkali.
Reason-Their inner layer intine is made up of sporopollenin

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • SEXUAL REPRODUCTION IN FLOWERING PLANTS

    MOTION|Exercise Exercise - 4(AIIMS-2016)|3 Videos

  • SENSORY ORGANS

    MOTION|Exercise EXERCISE - 3|21 Videos

  • STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

    MOTION|Exercise Exercise - 3(AIIMS-2015)|13 Videos

Similar Questions

Explore conceptually related problems

Assertion :- Pollen grainscan withstandhigh temperature and strong acids and alkali. Reason-Theirnnehrarldayeirn tinisemaduep of sporopollenin

The outer layer of pollen is made up of :

Exine in pollen grain in made up of

Intine of pollen grain is made of

Fill in the blanks : B. ……… of pollen grains is made up of sporopollenin.

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.

The intine of a pollen grain is mainly made up of

Inner layer of root hair is made up of __________

Assertion Pollen grains are well preserved during fossilisation. Reason The exine of pollen grain contains sporopollenin.

Consider the following statements with respect to pollen grains (a) Exine is thin, continuous layer made up of cellulose and pectin (b) Hard outer layer called exine is made of sporopollenin (c) Sporopollenin is present in germ pores (d) Exine exhibits a fascinating array of patterns and designs. Of the above statements

MOTION-SEXUAL REPRODUCTION IN FLOWERING PLANTS-Exercise - 4(AIIMS-2018)
  1. Ploidy level of Nucellus, endosperm, polar nuclei , Megaspore mother c...

    Text Solution

    |

  2. Assertion :- In majority of angiosperms a typical anther is bilobed. ...

    Text Solution

    |

  3. Assertion :- Pollen grains can withstand temperature and strong acids...

    Text Solution

    |

  4. Assertion :- Inner most layer of microsporangium or pollen sac, tapetu...

    Text Solution

    |

  5. Assertion :- In western countries a large number of pollen products in...

    Text Solution

    |

  6. Assertion: Cleistogamous flowers are invariably autogamous. Reason : T...

    Text Solution

    |

  7. Asertion :- Cleistogamy is disadvantageous for plants. Reason:- Clei...

    Text Solution

    |

  8. Assertion :- Geitonogamy is functionaly cross pollination and genetica...

    Text Solution

    |

  9. Assertion :- It is believed particularly for some bryophytes and pteri...

    Text Solution

    |

  10. Assertion :- All aquatic plants use water for pollination. Reason :- ...

    Text Solution

    |

  11. Assertion :- Both wind and water pollinated flowers are not very colou...

    Text Solution

    |

  12. Assertion :- Non synchronised pollen release and stigma receptivity is...

    Text Solution

    |

  13. Assertion :- In monoecious plants neither autogamy nor geitonogamy can...

    Text Solution

    |

  14. Assertion :- Most zygotes divide only after certain amount of endosper...

    Text Solution

    |

  15. Assertion :- Seed bearing plants like angiosperms show wide geographic...

    Text Solution

    |

  16. Assertion :- Apomixis is a form of asexual reproduction that mimics se...

    Text Solution

    |

  17. Assertion :- Endosperm increases the success rate of seedling developm...

    Text Solution

    |

  18. Assertion : Clone is formed by amphimixis. Reason : ln amphimixis, ne...

    Text Solution

    |

  19. Assertion : Synergids of embryosac also help in fertilization in Angio...

    Text Solution

    |

  20. Assertion : When embryo sac develops from megaspore mother cell withou...

    Text Solution

    |