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

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

AIPMTAIPMT 2011Animal Kingdom

Solution:

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. Egg laying mammals include duck-billed platypus. Chondrichthyes (cartilaginous fishes) are the fishes that have cartilaginous endoskeleton. There is no exception to this.