Home
Class 12
BIOLOGY
Select the option which correctly identi...

Select the option which correctly identify the given plant.

A

Helianthus

B

Commelina

C

Rosa

D

Gossypium

Text Solution

Verified by Experts

The correct Answer is:
B
Commelina produces two types of flowerchasmogamous flowers which are similar to flowers of other species with exposed anthers and stigma and cleistogamous flowers which do not open at all. In such flowers, the anthers and stigma lie close to each other. when anthers dehisce in the flower buds, pollen grains come in contact with the stigma to effect pollination. Thus, cleistogamous flowers are invariably autogamous as there is no chance of cross-pollen landing on the stigma. Cleistogamous flowers assure seed-setting even in the absence of pollinators.
Promotional Banner

Topper's Solved these Questions

  • REPRODUCTIVE HEALTH

    NCERT FINGERTIPS|Exercise Reproductive Health|133 Videos

  • STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

    NCERT FINGERTIPS|Exercise Strategies For Enhancement In Food Production|151 Videos

Similar Questions

Explore conceptually related problems

Select the option that correctly identifies

X' is the skeleton which is present inside the body of an organism 'Y'. Select the option which correctly identifies X and Y.

Refer to the given figure and select the option which correctly identifies A,B and C

Refer to the given figure representing mechanism of translocation and select the option which correctly identifies A.B and C

Refer to the given figure. Select the option which correctly identifies (i-iii).

Given below is the diagram of the embryo sac with certain labels (A-D). Select the option that correctly identifies the labels.

Select the option that correctly identifies the labels A,B, C and D in the given diagram.

NCERT FINGERTIPS-SEXUAL REPRODUCTION IN FLOWERING PLANTS-Sexual Reproduction In Flowering Plants
  1. The female gametopyte of a typical dicot at the time of fertilisation ...

    Text Solution

    |

  2. Polygonum type of embryo sac is

    Text Solution

    |

  3. Select the option which correctly identify the given plant.

    Text Solution

    |

  4. Even in absence of pollinating agents seed-setting is assured in

    Text Solution

    |

  5. Which of the following options is correct ?

    Text Solution

    |

  6. The given diagram shows two plants of the same species. Identify the t...

    Text Solution

    |

  7. Male and femal flowers are present on different plants (dioecious) to ...

    Text Solution

    |

  8. Select the mismatched pair.

    Text Solution

    |

  9. Feathery stigma occurs in

    Text Solution

    |

  10. Plants with ovaries having only one or a few ovules are generally poll...

    Text Solution

    |

  11. Refer to the given characteristics of some flowers. (i) LIght and no...

    Text Solution

    |

  12. Which of the following is not a water pollination plant ?

    Text Solution

    |

  13. Select the incorrect pair of type of pollination and the corresponding...

    Text Solution

    |

  14. Spiny or sticky pollen grains and large, attractively coloured flowers...

    Text Solution

    |

  15. Fragrant flowers with cell developed nectaries are an adaptation for

    Text Solution

    |

  16. Read the given statements and select the correct option. Statement 1...

    Text Solution

    |

  17. Refer to the given statements. (i) Both wind and water pollinated fl...

    Text Solution

    |

  18. Choose the mismatched pair.

    Text Solution

    |

  19. Match column I with column II and select the correct option from the g...

    Text Solution

    |

  20. Pollen kitt is generally found in

    Text Solution

    |