Home
Class 12
BIOLOGY
In 40 percent of angiosperms, pollen gra...

In 40 percent of angiosperms, pollen grains are shed at

A

2 - celled

B

3 - celled

C

4 - celled

D

5 - celled

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • SAY 2018 QUESTION PAPER

    MAXIMUM PUBLICATION|Exercise EXAMPLE|4 Videos

  • STRATEGIES FOR ENHACEMENT IN FOOD PRODUCTION

    MAXIMUM PUBLICATION|Exercise EXERCISE|89 Videos

Similar Questions

Explore conceptually related problems

In over 60 percent of angiosperms, pollen grains are shed at

60% of angiosperms, pollen grains shed at 2 celled stage, but in some species pollen grains are shed at 3 celled stage. Distinguish between 2 celled and 3 celled stage of pollen grains ?

Read the following statements carefully and select the appropriate option given below. (i) The distal end of the filament is attached to the thalamus or the petal of the flower. (ii) The pollen grains represent the male sporophyte. (iii) The microsporangia develop further and become embryo sac. (iv) In over 60 per cent of naked seeded plant, pollen grains are shed at this 2-celled stage. (v) As anthers mature and dehydrate the microspores, dissociate from each other and develop into pollen grains.

Pollen grains if angiosperms are non-motile. So, they have to be carried to the stigma by external agents. a. Name the process of transfer of pollen grains from the anther to the stigma of flower. b. Write the name of three such agents.

In pollen banks pollen grains are stored in________at -196^@C .

The generative cell of a pollen grain

The pollen grains represent the male gametophytes. Describe the structure of mature pollen grains at released stage in common plants.

MAXIMUM PUBLICATION-SEXUAL REPRODUCTION IN FOLLOWING PLANTS-EXERCISE
  1. Egg apparatus of angiosperms consist of One synergid and two egg ce...

    Text Solution

    |

  2. In some organisms, karyokinesis is not followed by cytokinesis as e re...

    Text Solution

    |

  3. During the formation of embryo sac, the functional megaspore undergoes

    Text Solution

    |

  4. One adavantage of Cleistogamy is

    Text Solution

    |

  5. Which one of the following statements is not true?

    Text Solution

    |

  6. Sporopollenin is chemically

    Text Solution

    |

  7. Which one of the following pairs of plant structures has haploid numbe...

    Text Solution

    |

  8. What does filiform apparatus do at the entrance into ovule. It

    Text Solution

    |

  9. Which one of the following plant products is the hardest ?

    Text Solution

    |

  10. A typical angiosperm embryo sac at maturity is

    Text Solution

    |

  11. Why sometimes, even diploid offspring is produced through parthenogene...

    Text Solution

    |

  12. Pollen grains are stored for long period without losing its viability ...

    Text Solution

    |

  13. Filliform apparatus of an embryosac is located at

    Text Solution

    |

  14. Double fertilization is very common in

    Text Solution

    |

  15. In Citrus and mango the polymbryony is the special feature of occuranc...

    Text Solution

    |

  16. Triple fusion takes place in angiosperm is due to

    Text Solution

    |

  17. In 40 percent of angiosperms, pollen grains are shed at

    Text Solution

    |

  18. In artificial hybridization bagging is done to

    Text Solution

    |

  19. How many mitotic divisions are required for the formation of mature em...

    Text Solution

    |

  20. The allergies and bronchial affictions in some people often leading to...

    Text Solution

    |