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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