Home
Class 12
BIOLOGY
[A] : All the gills of Palaemon are phyl...

[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 .

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

  • ANATOMY OF FLOWERING PLANTS

    TRUEMAN BIOLOGY|Exercise MULTIPLE CHOICE QUESTIONS|194 Videos

  • ANIMAL KINGDOM -NONCHORDATES

    TRUEMAN BIOLOGY|Exercise MCQ|291 Videos

Similar Questions

Explore conceptually related problems

Balls are arranged in rows to form an equilateral triangle. The first row consists of one ball, the second row of two balls and so on. If 669 more balls are added,then all the balls can be arranged in the shape of a square and each of the sides, then contains 8 balls less than each side of the triangle. Determine the initial number of balls.

P, Q, R and S are four major types of phytohormones. P is a phytohormone which functions mainly as a growth inhibitor. It promotes the wilting and falling of leaves. Q, R and S are phytohormones which all promote growth of plant in various ways like Q is responsible for the phototropism in plants while Ris involved mainly in shoot development. The phytohormone S helps in breaking the dormancy of seeds and buds. What is P, Q, R and S.

Assertion:Frog's tadpole has fish-like form, tail and gills Reason: Tadpole stage is the recapitulation of the fish-like ancestor of frog in the latter's life history

TRUEMAN BIOLOGY-Animal Kingdom -ASSERTION AND REASON
  1. [A] : Presence of alimentary canal would not have suited the mode of l...

    Text Solution

    |

  2. [A]: Development in cockroach is termed as retrogressive metamorphosis...

    Text Solution

    |

  3. [A] : All the gills of Palaemon are phyllobranchs . [R] : Each gill ...

    Text Solution

    |

  4. [A] : Renal-sac of Prawn functions in same manner as vertebrate kidney...

    Text Solution

    |

  5. [A] : Pila is adopted to lead an amphibious life . [R] : It is provi...

    Text Solution

    |

  6. [A] : Chordates have poor regeneration power while non-chordates have ...

    Text Solution

    |

  7. [A] : In lower invertebrates the digestion is intracellular while in h...

    Text Solution

    |

  8. [A] : Chordates have an oxygen carrying pigment called haemoglobin . I...

    Text Solution

    |

  9. [A] : Huxley comments that Birds are glorified reptiles . [R] : Bird...

    Text Solution

    |

  10. [A] : Birds excrete uric acid . [R] : Birds do not have a urinary b...

    Text Solution

    |

  11. [A] : In elastic lungs of birds are supplemented by remarkable system ...

    Text Solution

    |

  12. [A] : Sphenodon is referred to as a living fossil . [R] : It has ret...

    Text Solution

    |

  13. [A] : In reptiles , lizards show autotomy . [R] : Tail of most lizar...

    Text Solution

    |

  14. [A] : Heloderma is called beaded lizard . [R] : Its scales resemble ...

    Text Solution

    |

  15. Assertion: Kraits ar poisonous snakes. Reason: Belly scales are smal...

    Text Solution

    |

  16. [A] : In the adult bird , only the left ovary is well developed . [R...

    Text Solution

    |

  17. [A] : Rabbit is classified as mammal . [R] : Rabbit possesses mammar...

    Text Solution

    |

  18. [A] : Origin of mammals is polyphyletic . [R] : Mammals are derived...

    Text Solution

    |

  19. [A] : The Ascidian tadpole larva possess all the basic chordate charac...

    Text Solution

    |

  20. [A] : Tail wagging dance is performed for short distances . It conveys...

    Text Solution

    |