Home
Class 10
BIOLOGY
A flower which never opens and its polle...

A flower which never opens and its pollen grains germinate inside the anther and their pollen tubes enter the carpels to fertilise the ovules is called

A

Thigmotropism

B

Phototropism

C

Chemotropism

D

Hydrotropism

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • CONSERVING NATURAL RESOURCES

    VGS PUBLICATION-BRILLIANT|Exercise FILL IN THE BLANKS|15 Videos

  • COORDINATION - THE LINKING SYSTEM

    VGS PUBLICATION-BRILLIANT|Exercise 4 MARK QUESTIONS|80 Videos

Similar Questions

Explore conceptually related problems

The phenomenon of pollen tube entering the ovule laterally through integuments is called

The entry of pollen tube into the ovule through micropyle is called

When pollen grains are not transferred from rahthers to stigma in a flower, due to the physical barrier, it is called

Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called

Read the following lines, find the error and rewrite it. Pollen grain may have a pollen tube and one nucleus. It germinates only on the style.

The Pollen grain has 2 Nuclei. Whenever the pollen tube enters the Embryo soon after the tip of the pollen tube enters the embryo sec, the end of the tube ruptures and releases the two sperms into the embryo sac. One of the two sperms fuses with the egg to form 'X' and another sperm fuses with polar nuclei and form Y. What are X and Y in the above para?

Inflorescene of Pisum consists of 20 flowers. Each anther lobe consists 80 Pollengrains. Calculate the total number of pollen grains formed in large staminal bundles of flower in that plant

Fill in the blanks: Pollen grain from anther of one flower that reaches the stigma of another flower is called____________.

A pollen tube enters the ovule through chalaza lying opposite the micropyle. It will enter the embryo sac through

The type of pollination involving transfer of pollen grains from anther to the stigma of the same flower is known as

VGS PUBLICATION-BRILLIANT-COORDINATION-EXERCISE
  1. Name the nervous system formed by the chain of ganglia on either side ...

    Text Solution

    |

  2. What do we call the action of kicking a foot ball ?

    Text Solution

    |

  3. Who transmits nerve impulse across the synapse ?

    Text Solution

    |

  4. Synapse are mainly found on?

    Text Solution

    |

  5. Afferent neurons carry impulses from to

    Text Solution

    |

  6. What carries the nerve impulse to the spinal cord?

    Text Solution

    |

  7. What are the divisions of brain ?

    Text Solution

    |

  8. The part of the brain that to emotion and speech is responds

    Text Solution

    |

  9. Which part of the brain acts as the centre for the cardiac, respirator...

    Text Solution

    |

  10. Raju got angry at Bharathi. But the anger decreased after sometimes. W...

    Text Solution

    |

  11. Pranav touched Mimosa pudica leaves. They are folded by his touch,. th...

    Text Solution

    |

  12. A plant which grows near a window bends towards sunlight write the rea...

    Text Solution

    |

  13. Who conducted the experiment on coleoptile tips of oat seedlings ?

    Text Solution

    |

  14. Identify this.

    Text Solution

    |

  15. Name the hormone that is responsible for diabetes mellitus.

    Text Solution

    |

  16. A flower which never opens and its pollen grains germinate inside the ...

    Text Solution

    |

  17. denotes.

    Text Solution

    |

  18. Increased rate of respiration during ripening of fruits is known as

    Text Solution

    |

  19. How many Islets of Langerhans are present in normal human pancreas?

    Text Solution

    |

  20. Which of the following facillitates opening of stomatal aperture ?

    Text Solution

    |