First slide
Classification of Animals
Question

Which of the following represents the correct combination of a group with its character, without any exception? 

Easy
Solution

All Protochordates are marine. Among Reptiles, 

Turtles, sea snakes, freshwater snakes, crocodiles are aquatic. 

Among Mammals, Prototherians are oviparous e.g. Platypus (Ornithorhynchus). 

Among Aves, skin contains oil gland at the base of the tail.

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