Home
Class 12
BIOLOGY
Are pollination and fertilisation necess...

Are pollination and fertilisation necessary in apomixis? Give reasons.

Text Solution

AI Generated Solution

### Step-by-Step Solution: 1. **Understanding Pollination**: - Pollination is the process where pollen grains are transferred from the anther (the male part of the flower) to the stigma (the female part of the flower). This is a crucial step in sexual reproduction for many flowering plants. 2. **Understanding Fertilization**: - Fertilization occurs when male and female gametes fuse together, leading to the formation of a zygote. This is essential for the development of seeds in sexual reproduction. ...
Promotional Banner

Topper's Solved these Questions

  • SEXUAL REPRODUCTION IN FIOWERING PIANTS

    NCERT EXEMPLAR ENGLISH|Exercise Short Answer Type Questions|10 Videos
  • SEXUAL REPRODUCTION IN FIOWERING PIANTS

    NCERT EXEMPLAR ENGLISH|Exercise Long Answer Type Questions|5 Videos
  • SEXUAL REPRODUCTION IN FIOWERING PIANTS

    NCERT EXEMPLAR ENGLISH|Exercise Long Answer Type Questions|5 Videos
  • REPRODUCTIVE HEALTH

    NCERT EXEMPLAR ENGLISH|Exercise LONG ANSWER TYPE QUESTIONS|5 Videos
  • STRATEGIES FOR ENHANCMENT IN FOOD PRODUCTION

    NCERT EXEMPLAR ENGLISH|Exercise Long Answer type Questions|8 Videos

Similar Questions

Explore conceptually related problems

Is pollination and fertilisation necessary in apomixis ? Give reason

Is pollination and fertilization necessary in apomixis ? Give reason.

Apomixis is

Define apomixis.

Is water conservation necessary? Given reasons.

cross pollination and self pollination.

Assertion : Self-incompatibility is a genetic mechanism which prevents self-pollination and thereby fertilisation by inhibiting either pollen germination or pollen tube growth in the pistil. Reason : In gametophytic self-incompatibility, the incompatibility reaction is determined by the genotype of the sporophytic tissue of the plant from which the pollen is derived.

Distinguish between pollination and fertilisation. Mention the site and product, of fertilisation in a flower. Draw a neat, labelled diagram of a pistil showing pollen tube growth and its entry into the ovule.

Enlist the steps of controlled cross-pollination. Would emasculation be needed in a cucurbit plant? Give reasons for your answer.

NCERT EXEMPLAR ENGLISH-SEXUAL REPRODUCTION IN FIOWERING PIANTS-Very Short Answer Type Questions
  1. Name the component cells of the 'egg-apparatus' in an embryo sac.

    Text Solution

    |

  2. Name the part of gynoecium that determines the compatible nature of po...

    Text Solution

    |

  3. Name the common function that cotyledons and nucellus perform.

    Text Solution

    |

  4. Complete the following flow chart

    Text Solution

    |

  5. Indicate the stages where meiosis and mitosis occur (1, 2 or 3 ) in th...

    Text Solution

    |

  6. In the diagram given below, show the path of a pollen tube from the po...

    Text Solution

    |

  7. Name the parts of pistil which develop into fruit and seeds.

    Text Solution

    |

  8. In a case of polyembryony if an embryo develops from the synergid and ...

    Text Solution

    |

  9. Can an unfertilised, apomictic embryo sac give rise to diploid embryo ...

    Text Solution

    |

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

    Text Solution

    |

  11. What is self-incompatibility ?

    Text Solution

    |

  12. Name the type of pollination in self-incompatible plants.

    Text Solution

    |

  13. Draw the diagram of a mature embryo sac and show its eight -nucleate, ...

    Text Solution

    |

  14. Which is the triploid tissue in a fertilised ovule? How is the triploi...

    Text Solution

    |

  15. Are pollination and fertilisation necessary in apomixis? Give reasons.

    Text Solution

    |

  16. Identify the type of carpel with the help of diagrams given below

    Text Solution

    |

  17. How is pollination carried out in water plants?

    Text Solution

    |

  18. What is the function of the two male gametes produced by each pollen g...

    Text Solution

    |