Home
Class 12
BIOLOGY
Assertion (A): Many visitors to the hill...

Assertion (A): Many visitors to the hills suffer from skin and respiratory allergy problems.
Reason (R): Conifer trees produce a large quantity of wind- borne pollen grains.

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • PLANT KINGDOM

    TRUEMEN BIOLOGY ENGLISH|Exercise MULTIPLE CHOICE QUESTION|243 Videos

  • Plant Physiology

    TRUEMEN BIOLOGY ENGLISH|Exercise ASSERTION AND REASON|89 Videos

Similar Questions

Explore conceptually related problems

Many visitors to the hills suffer from skin and allergy problems because

Assertion : Conifer trees produce a large quantity of wind-borne pollen grains Reason : The pollen grains have wings.

Pollen grains are produced in large quantity in wind-pollinated flowers.

why are pollen grains produced in large quantity in wind -pollinated flowers?

Wind-pollinated flowers produce pollen grains in large quantity. [ ]

Give a reason for each of the following : Pollen grains of wind pollinated flowers are produced in large quantities.

Assertion : Although geitonogamy is functionally crosspollination involving a pollinating agent, genetically it is similar to autogamy. Reason : In geitonogamy, pollen grains from the anthers of one flower are transferred to the sigma of another flower borne on the same plant.

TRUEMEN BIOLOGY ENGLISH-Plant Morphology & Reproduction -ASSERTION AND REASON
  1. [A]: Pollination is essential for fertilization. [R]: Abscission or...

    Text Solution

    |

  2. [A]: The biennial plants live for two years. [R]: They flower in bo...

    Text Solution

    |

  3. Assertion (A): Many visitors to the hills suffer from skin and respira...

    Text Solution

    |

  4. [A]: Endosperm is tripolid in angiosperms. [R]: In gymnosperms, it ...

    Text Solution

    |

  5. Assertion. A pollen grain of angiosperm is considered as the male game...

    Text Solution

    |

  6. Assertion. In apomixis , plants of new genetic sequence are produced. ...

    Text Solution

    |

  7. Assertion : In collateral vascular bundles phloem is situated toward ...

    Text Solution

    |

  8. [A]: The secondary phloem constitutes a less prominent part of the tre...

    Text Solution

    |

  9. [A] : The narrow band of meristemetic tissue present between pholem an...

    Text Solution

    |

  10. [A]: The inner most distinict layer of the cortex is called endodermi...

    Text Solution

    |

  11. [A]: Gramineoos type of stomata are found in Gramineae and Cyperaceae....

    Text Solution

    |

  12. [A]: lntercellular spaces are found in mer-isematic cells (R]: The m...

    Text Solution

    |

  13. [A]: Monocot stem has collateral open vascu- lar bundle. [R]: Open ...

    Text Solution

    |

  14. [A]: Root system in hydrophytes is poorly de- veloped. [R]: The con...

    Text Solution

    |

  15. [A]: Aerenchyma is a characteristic of litho- phyte. [R]: It is a sp...

    Text Solution

    |

  16. [A]: Protostele is most simple primitive type of stele. [R]: Accordi...

    Text Solution

    |

  17. [A]: Rubber is obtained from the latex of Hevea brasiliensis. [R]: B...

    Text Solution

    |

  18. [A]: No fibres are found in plants. [R]: Xylem vessels are absent ...

    Text Solution

    |

  19. [A]: Sclerenchyma cells are rarely found in plants. [R]: Sclerencym...

    Text Solution

    |

  20. [A]: Hanstein's dermatogen is not eqyivalent to Haberlandt's Protoderm...

    Text Solution

    |