Which one of the following groups of animals is correctly matched with its characteristic feature without any exception?

Reptilia : Possess 3-chambered heart with an incompletely divided ventricle

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Chordata : Possess a mouth with an upper and a lower jaw

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Condrichthyes : Possess cartilaginous endoskeleton

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Mammalia : Give birth to young ones

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Solution

The correct option is C Condrichthyes : Possess cartilaginous endoskeleton
Reptiles usually possess 3-chambered heart but crocodiles are an exception with 4-chambered heart.

Not all chordates have a mouth with upper and lower jaw. Example - class Cyclostomata.

Egg laying mammals include duck billed platypus.

Chondrichthyes (cartilaginous fishes) are the fishes that have cartilaginous endoskeleton. There is no exception to this.

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