Home
Class 12
BIOLOGY
[A] : 2,4-D is a herbicide [R] : It is...

[A] : 2,4-D is a herbicide
[R] : It is not used during showing of crops

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 Morphology & Reproduction

    TRUEMAN BIOLOGY|Exercise ASSERTION AND REASON|59 Videos

  • PRINCIPLES OF INHERITANCE AND VARIATIONS

    TRUEMAN BIOLOGY|Exercise MCQs|322 Videos

Similar Questions

Explore conceptually related problems

In birds crop is used for

[A] : Yeast are used in baking industry . [R] : CO_(2) produced during fermentation causes bread dough to rise by thermal expansion .

Keeping beehives in crop fields during flowering period increases

List out some useful traits in improved crop ?

It is recommended to farmers to use 2-4 D in field of wheat crop. Why?

Chemicals like fertilizers, herbicides and pesticides are not used in ………….. Farming .

(Allocation problem) A cooperative society of farmers has 50 hectare of land to grow two crops X and Y. The profit from crops X and Y per hectare are estimated as Rs 10,500 and Rs 9,000 respectively. To control weeds, a liquid herbicide has to be used for crops X and Y at rates of 20 litres and 10 litres per hectare. Further, no more than 800 litres of herbicide should be used in order to protect fish and wild life using a pond which collects drainage from this land. How much land should be allocated to each crop so as to maximise the total profit of the society?

TRUEMAN BIOLOGY-Plant Physiology -ASSERTION AND REASON
  1. Assertion. The atmospheric concentration of CO(2) at which photosynthe...

    Text Solution

    |

  2. Assertion: Sigmoid growth curve consists of four parts. Reason : La...

    Text Solution

    |

  3. [A] : 2,4-D is a herbicide [R] : It is not used during showing of cr...

    Text Solution

    |

  4. [A] : Nastic movements occur in the directions of stimuls [R] : "Tou...

    Text Solution

    |

  5. [A] : Germinating seeds which store fats as reserve food material are ...

    Text Solution

    |

  6. [A] : Gibberellic acid , when added to isolated aleurone , induce amyl...

    Text Solution

    |

  7. [A] : When apical bud is removed, the next axial bud begins to grow ou...

    Text Solution

    |

  8. [A]: Xanthium will not flower if the long dark period is interrupted b...

    Text Solution

    |

  9. [A]: Senescence is induced by the applica- tion of cytokinin in plants...

    Text Solution

    |

  10. Assertion : A correct concentration of auxin and cytokinin is required...

    Text Solution

    |

  11. [A]: The endogenous level of plant hormones is measured by Bioassay te...

    Text Solution

    |

  12. [A] : Bolting of rosette plants is caused by Gibberellins. [R]: Gibb...

    Text Solution

    |

  13. [A] : Cytokinins help in the retention of chloro- phyll and delay sene...

    Text Solution

    |

  14. [A]: Plants hormones are called phytohor- mones [R]: They increase ...

    Text Solution

    |

  15. [A] : Senescence occurs in all non meristematic cells. [B]: Meristem...

    Text Solution

    |

  16. Assertion . Senescence is the time when age associated defects are man...

    Text Solution

    |

  17. Assertion: Photosynthetically C(4) plants are less efficient than C(3)...

    Text Solution

    |

  18. Assertion. The atmospheric concentration of CO(2) at which photosynthe...

    Text Solution

    |

  19. Asserotion: C(4) photosynthetic pathway is more efficient than the C(3...

    Text Solution

    |

  20. Assertion : Photomorphogenetic responses are controlled by the pigment...

    Text Solution

    |