Home
Class 12
BIOLOGY
[A] : The function of phyllotaxy is to d...

[A] : The function of phyllotaxy is to display leaves properly .
[R] : It is for getting maximum light by all leaves so that chance of shading is reduced .

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

[A]: Maximum transpiration occurs in meso- phytes than xerophytes. [R]: In mesophytes stomata are found on both surfaces of leaves and guard cells show frequent movements

If one of tow identical slits producing interference in Young's expeiment is covered with glass, so that the light intensity passing through it is reduced to 50% , find the ratio of the maximum and minimum intensity of the fringe in the interence pattern.

[A] : All the gills of Palaemon are phyllobranchs . [R] : Each gill consists of two rows of leaf like rhombodial gill-plates arranged like the leaves of a book .

Twleve equal wires , each of resistance r ohm , are connected so as to form a frame of a cube . An electric current enters this cube at one corner and leaves from the diagnalyy opposite corner . Calculate the total resisatance between the corners .

You are given 'n' resistors,each of resistance 'r'.These are first connected to get minimum possible resistance.In the second,case these are again connected differently to get maximum possible resistance.Compute the ratio between the minimum and maximum values of resistances so obtained.

Let f be a function defined on R (the set of all real numbers) such that f^(prime)(x)=2010(x-2009)(x-2010)^2(x-2011)^3(x-2012)^4, for all x in Rdot If g is a function defined on R with values in the interval (0,oo) such that f(x)=ln(g(x)), for all x in R , then the number of point is R at which g has a local maximum is ___

Six wires. Each of resistancde r. are connected so as to form a tetrahedron. The equivalent resistance of the combination when current enters through one corner and leaves through some corner is

TRUEMAN BIOLOGY-Plant Morphology & Reproduction -ASSERTION AND REASON
  1. [A] : Above ground stolons produce new plants where nodes touch the gr...

    Text Solution

    |

  2. [A] : Bulb does not function in vegetative reproduction . [R] : It i...

    Text Solution

    |

  3. [A] : The function of phyllotaxy is to display leaves properly . [R]...

    Text Solution

    |

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

    Text Solution

    |

  5. [A] : In creepers, leaves are produced upon the nodes. [R] : Advent...

    Text Solution

    |

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

    Text Solution

    |

  7. [A] : The switchover from vegetative to reproductive phase is now poss...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  14. [A] : Bees are colour-blind for red and are fond of yellow, violet and...

    Text Solution

    |

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

    Text Solution

    |

  16. [A] : The presence of endothelium around the embryo sac and its cytolo...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  19. [A] : Nucleus of pollen grain divides meiotically and form a pollen tu...

    Text Solution

    |

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

    Text Solution

    |