NEET Biology NEET PYQ-Biological Classification and System of Classification

  • question_answer
    Which one of the following categories of animals, is correctly described with no single exception in it?     [AIPMT (M) 2012]

    A) All reptiles possess scales, have a three- chambered heart and are cold-blooded (poikilothermal)

    B) All bony fishes have four pairs of gills and an operculum on each side

    C) All sponges are marine and have collared Ceils

    D) All mammals are viviparous and possess diaphragm for breathing

    Correct Answer: D

    Solution :

    [d] Prototherian mammals are oviparous; Sponges are aquatic mostly marine some sfreshwater have   cellular   grade   of   organization.
    Choanocytes or collar cells are characteristics of porifers. Four pairs of gills occur in bony fishes. The gills are covered over by operculum on either side.
    All reptiles posses scales, are cold blood but have three-chambered and four-chambered heart.

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