Statistics for Classes of Vertebrates

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Description	Class	% Correct
Live in water and on land, have 4 limbs that evolved from fins	Amphibia	96%
Technically a subgroup of reptiles, have feathers, toothless beaked jaws and lay eggs	Aves	96%
Distinguished by possesion of hair, 3 middle ear bones and mammary glands	Mammalia	96%
Cold blooded, have 4 limbs, lay eggs	Reptilia	96%
Slime producing marine fish, have a skull but no vertebral column	Myxini	32%
Cartilaginous fishes, have jaws, paired fins, scales and no bone	Chondrichthyes	12%
Bony fishes, cold blooded, use gills for breathing and fins for swimming	Osteichthyes	12%
Armored, jawless fishes, thought to be extinct	Cephalospidomorphi	0%