First slide

Classification of Animals

Question

Which of the following is a general character of class amphibia?

Moderate

A

Presence of four chambered heart and absence of scales
B

Presence of cloaca and absence of eyelids
C

Presence of moist skin and absence of neck
D

Presence of lungs and absence of tympanum

Solution

The amphibian skin is moist and is without scales. The eyes have eyelids. A tympanum represents the ear. Alimentary canal, urinary and reproductive tracts open into a common chamber called cloaca which opens to the exterior. Respiration is by gills, lungs and skin. The heart is three-chambered.

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