Home
Class 12
BIOLOGY
[A]: Rhizobial aggregates have been ob- ...

[A]: Rhizobial aggregates have been ob- served at distinct sites on curled root hairs.
[R]: The infection thread is formed by a pro- cess of invagination of the hair cell walls in the region of curling

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:
A
Promotional Banner

Topper's Solved these Questions

  • Plant Morphology & Reproduction

    TRUEMAN BIOLOGY|Exercise ASSERTION AND REASON|64 Videos

  • PRINCIPLES OF INHERITANCE AND VARIATIONS

    TRUEMAN BIOLOGY|Exercise MCQs|341 Videos

Similar Questions

Explore conceptually related problems

Select the correct statements. (i) From the region of elongation, some of the epidermal cells form root hairs. (ii) Pneumatophores are seen in Rhizophora. (iii) Adventitious roots are seen in the Banyan tree. (iv) Maize and sugarcane have prop roots.

TRUEMAN BIOLOGY-Plant Physiology -ASSERTION AND REASON
  1. [A]: The evolution of molecular oxygen is concerned with photosystem-1...

    Text Solution

    |

  2. [A]: Hill and Bendall proposed Z-scheme and suggested that photosystem...

    Text Solution

    |

  3. [A]: Rhizobial aggregates have been ob- served at distinct sites on cu...

    Text Solution

    |

  4. [A]: Light is very important external factor of transpiration. [R]:...

    Text Solution

    |

  5. [A]: Wax, resin and suberin coating on the surface of plant parts redu...

    Text Solution

    |

  6. [A]: Gibberellic acid when added to isolated aleurone layer, induces a...

    Text Solution

    |

  7. Assertion : Auxillary buds, in actively growing herbaceous plants, gen...

    Text Solution

    |

  8. Assertion : If you burn a plant , its nitrogen component is given of...

    Text Solution

    |

  9. [A]: Amino acids are converted into ammonia by a group bacteria called...

    Text Solution

    |

  10. [A]: Due to excessive use of fertilizers, the available water to the p...

    Text Solution

    |

  11. [A]: Vernalization is also called as yarovization. [R]: In short day...

    Text Solution

    |

  12. [A]: Fundamental factor in the vernalization is low temperature. [R...

    Text Solution

    |

  13. [Aj: ABA plays an important role in plants during water stress and dro...

    Text Solution

    |

  14. (A]: Cytokinins help in retention of cholorophyll and delayed senescen...

    Text Solution

    |

  15. [A]: The germination of lettuce seeds is stimulated by red light and i...

    Text Solution

    |

  16. [A]: The far-red form of the phytochromes ab- sorb light at 740 nm. ...

    Text Solution

    |

  17. [A]: Elongation and division of cells are pro- moted by gibberellins. ...

    Text Solution

    |

  18. [A]: Senescence effect can be reversed by cytokinin. [R]: The loss ...

    Text Solution

    |

  19. [A]: Wilting occurs due to loss in turgidity. [R]: Turgor pressure c...

    Text Solution

    |

  20. [A]: Plasmolysis is seen by both living and dead cells. [R]: Both ty...

    Text Solution

    |