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Amphibians do not have the following: 

A. Three chambered heart 

B. Gills or lungs 

C. Scales 

D. Mucus glands

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Amphibians such as frogs, toads or salamanders have a three chambered heart (having two auricles and one ventricle), mucus glands which make the body slimy and gills or lungs present for respiration. 

Scales are absent in amphibians.

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