Home
Class 12
BIOLOGY
[A]: Senescence effect can be reversed b...

[A]: Senescence effect can be reversed by cytokinin.
[R]: The loss of liquid from leaves of intact plant is termed as guttation.

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|62 Videos

  • PRINCIPLES OF INHERITANCE AND VARIATIONS

    TRUEMAN BIOLOGY|Exercise MCQs|343 Videos

Similar Questions

Explore conceptually related problems

[A]: Senescence is induced by the applica- tion of cytokinin in plants. [R]: Cytokinin promotes the breakdown of chlorophyll, proteins and nucleic acid.

[A] : Virus free plants can be produced from virus infected plants by meristem tissue culture . [R] : Virus fall to grow during the growth of host tissue in the artificial medium .

[A] : Plants brought from the wild into cultivation retain original names . [R] : According to Article 29 of the code publication of new names and descriptions are effective when the printed matter is distributed to general public or to at least ten botanical institutions with libraries accesible to botanists generally .

(A]: Cytokinins help in retention of cholorophyll and delayed senescence in leaves. [R]: Cytokinins only stimulate root initiation

Study the following statement with reference to drugs and choose the incorrect ones (i). Barbiturates cause sleeplessness (ii). Opioids are obtained from the leaves of Erythroxylum coca (iii). Morphine is a very effective sedative and pain killer (iv). Cocaine is obtained from hemp plant

TRUEMAN BIOLOGY-Plant Physiology -ASSERTION AND REASON
  1. [A]: The far-red form of the phytochromes ab- sorb light at 740 nm. ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  6. [A]: The water is absorbed by the root and moves into the stem. [R]...

    Text Solution

    |

  7. [A]: Sulphur stabilizes protein structure. [R]: It does not partici...

    Text Solution

    |

  8. [A]: Stomata remain open during day [R]: Stomata help in gaseous exc...

    Text Solution

    |

  9. [A]: The nitrogen content of the plant cannot be detected accurately b...

    Text Solution

    |

  10. [A]: Submerged plants get CO2 in the form of carbonates and bicarbonat...

    Text Solution

    |

  11. [A]: The evolution of molecular oxygen is con- cerned with photosystem...

    Text Solution

    |

  12. [A]: Antitranspirants are used to retard tran- spiration. [R]: AbA ...

    Text Solution

    |

  13. Assertion. Calcium deficiency symptoms first appear in the apical regi...

    Text Solution

    |

  14. Assertion: Deficiency of sulpur causes chlorosis in plants Reason : ...

    Text Solution

    |

  15. Assertion : Water and mineral uptake by root hairs from the soil occur...

    Text Solution

    |

  16. [A]: Stomata open when guard cells have more H^+ . [R]: Increased K^+...

    Text Solution

    |

  17. [A]: In washed beet root cylinders, betacyanin pigment does not come o...

    Text Solution

    |

  18. [A]: Rate of transpiration is directly propor- tional to relative humi...

    Text Solution

    |

  19. [A]: Root cells have lower OP than leaf cells. [R]: Root cells have...

    Text Solution

    |

  20. [A]: Root pressure is largely responsible for ascent of sap in harbace...

    Text Solution

    |