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Q.
Which features are common to the animals belonging to class-Amphibia and class-Reptilia?
Animal Kingdom
Solution:
Option (b) is correct as
Class-Amphibia and class-Reptilia share the following features.
The presence of tympanum is seen in both classes, which represents the ear.
Animals of both classes are cold-blooded or poikilotherms and usually have a three-chambered heart (except crocodile).