Which one of the following categories of animals, is correctly described with no single exception in it?

  • Option 1)

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

  • Option 2)

    All sponges are marine and have collared cells.

  • Option 3)

    All mammals are viviparous and posses diaphragm for breathing

  • Option 4)

    All reptiles posses scales, have a three chambered heart and are cold blooded (poikolothermal)

 

Answers (1)

 

Body of Osteichthyes -

Streamlined with bony endoskeleton. Four pairs of gills are present covered by operculum on each side.

- wherein

Skin is covered by cycloid / ctenoid scales.

 

 


Option 1)

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

Correct option

Option 2)

All sponges are marine and have collared cells.

Incorrect option

Option 3)

All mammals are viviparous and posses diaphragm for breathing

Incorrect option

Option 4)

All reptiles posses scales, have a three chambered heart and are cold blooded (poikolothermal)

Incorrect option

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