Home
Class 12
BIOLOGY
[A] : Thorns may bear nodes and internod...

[A] : Thorns may bear nodes and internodes in some plants.
[R] : Thorns are modified stems as they arise in the axil of a leaf or at the apex a branch.

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

Promotional Banner

Topper's Solved these Questions

  • PLANT KINGDOM

    TRUEMAN BIOLOGY|Exercise MULTIPLE CHOICE QUESTION|252 Videos

  • Plant Physiology

    TRUEMAN BIOLOGY|Exercise ASSERTION AND REASON|91 Videos

Similar Questions

Explore conceptually related problems

Thorn is a modified branch because

Stem is modified into thorns in

What is thorn? How can you tell it is modified stem?

Green leaf-like one internode long stem branches are called

Modification in the form of leaf spines and stem thorns is observed in

The plant in which lower poriton of tendirl is modifieed stem while its upper portion is modified leaf is

Read the following statements about a leaf. Which amongst them are correct. I.The swollen leaf- base mainly seen in leguminous plants is called the pulvinus. II. The axillary bud arises from the axil formed by the leaf. III. The leaf shape and size differs from plant to plant.

Which of the statements is correct about leaflets of compound leaf? ( a ) They are always borne laterally in one plane. ( b ) They do not bear axillary bud. ( c ) They bear stipules at base. ( d ) They may arise at the tip of petiole.

Which of the following are incorrect? A. Plant seeds develop in ovule which itself usually becomes the fruit. B. Plants produce flowers in order to make seeds, so that their species can propagate, C. Just as roots of some plants store food, they may also have nodes, internodes and buds. D. For photosynthesis, leaves take in carbon dioxide and water from soil to release oxygen in air.

TRUEMAN BIOLOGY-Plant Morphology & Reproduction -ASSERTION AND REASON
  1. [A] : The function of phyllotaxy is to display leaves properly . [R]...

    Text Solution

    |

  2. [A] : Stilt roots are common in sugarcane, [R] : In sugarcane, thes...

    Text Solution

    |

  3. [A] : Thorns may bear nodes and internodes in some plants. [R] : Tho...

    Text Solution

    |

  4. [A] : Insectivorous plants grow in carbohydrate deficiend soil. [R] ...

    Text Solution

    |

  5. [A] : Synandrous condition is found in curcurbits. [R] : The male fl...

    Text Solution

    |

  6. [A] : Thorns may bear nodes and internodes in some plants. [R] : Tho...

    Text Solution

    |

  7. [A] : For dispersal by wind fruits and seeds should be light. [R] : ...

    Text Solution

    |

  8. Assertion. Dispersal of fruits in Xanthium takes place by wind and wat...

    Text Solution

    |

  9. [A] : For dispersal by wind fruits and seeds should be light. [R] : ...

    Text Solution

    |

  10. [A] : Xenogamy is defined as the transferance of pollen grain to stigm...

    Text Solution

    |

  11. [A] : Anemophillous plants have to produce enormous quantities of poll...

    Text Solution

    |

  12. Assertion. The time involved between pollination and fertilization var...

    Text Solution

    |

  13. [A] : Synergids play an important role in directing the pollen tube gr...

    Text Solution

    |

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

    Text Solution

    |

  15. [A]: Incompatibility is a gene physiological process. [R]: Moderate...

    Text Solution

    |

  16. [A]: The pollen sterility has been attributed to the malfunctioning of...

    Text Solution

    |

  17. [A]: The three cells of the egg apparatus are arranged in a triangular...

    Text Solution

    |

  18. [A]: Pollen grains from male parent are mostly transferred to the stig...

    Text Solution

    |

  19. [A]: The two sperms cells in a pollen tube often change their shape. ...

    Text Solution

    |

  20. [A] : Synandrous condition is found in curcurbits. [R] : The male fl...

    Text Solution

    |