Home
Class 12
BIOLOGY
Assertion: The duck-billed platypus and ...

Assertion: The duck-billed platypus and the spiny anteater, both are egg-laying animals yet they are grouped under mammals.
Reason: Both of them have seven cervical vertebrae and 12 pairs of cranial nerves.

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|190 Videos
  • ANIMAL KINGDOM -NONCHORDATES

    TRUEMAN BIOLOGY|Exercise MCQ|291 Videos

Similar Questions

Explore conceptually related problems

Assertion : The duct - billed Platypus and the spiny anteater, both are egg - laying animals yet are grouped under mammals. Reason : Both of them have seven cervical vertbrae and mammary glands without teats.

Ecological Indicators The presence of dragonflies can reveal changes in the water ecosystems more quickly than studying other animals or plants. In fact, from the nymph to the adult stage, the dragonfly has a significant, positive ecological impact. Dragonfly eggs are laid and hatched in or near water, so their lives impact both water and land ecosystems. Once hatched, dragonfly nymphs can breathe underwater which enables them to eat mosquito larvae, other aquatic insects and worms, and even small aquatic vertebrates like tadpoles and small fish and in the air. Adult dragonflies capture and eat adult mosquitoes. Community wide mosquito control programs that spray insecticides to kill adult mosquitoes also kill dragonflies. Assertion: Releasing dragonflies in areas where there is an outbreak of malarial diseases can be an environment friendly method of control. Reason: Dragon flies are dominant species and will not allow mosquitoes to reproduce

TRUEMAN BIOLOGY-Animal Kingdom -ASSERTION AND REASON
  1. [A] : In reptiles , lizards show autotomy . [R] : Tail of most lizar...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  9. [A] : A pair of coxal glands are found in each side of metasoma of sco...

    Text Solution

    |

  10. [A] : Honey bees are social insects known for producing honey and bees...

    Text Solution

    |

  11. Assertion : Cold blooded animals do not have fat layer. Reason : Col...

    Text Solution

    |

  12. [A] : Neoteny is the retention of larval form throughout the life . ...

    Text Solution

    |

  13. [A] : In Parthenogenesis , fertilized egg is stimulated to divide . ...

    Text Solution

    |

  14. [A] : Protozoans have no physiological division of labour . [R] : Th...

    Text Solution

    |

  15. [A] : Many desert mammals cool the exhaled air in their noses , befor...

    Text Solution

    |

  16. [A] : Amoeba is regarded as the lowest form of animals. [R] : Body o...

    Text Solution

    |

  17. Assertion : Bats and whales are classified as mammals Reason : Bats ...

    Text Solution

    |

  18. [A] : The coelomic cavity of Leech is mostly filled with botryoidal ti...

    Text Solution

    |

  19. [A] : When a foreign object , such as a sand grain gets in between the...

    Text Solution

    |

  20. Assertion: The duck-billed platypus and the spiny anteater, both are e...

    Text Solution

    |