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

Question

Which one of the following groups of animals is correctly matched with its characteristic feature without any exception? (A) Reptilia: possess 3-chambered heart with an incompletely divided ventricle (B) Chordata: possess a mouth provided with an upper and a lower jaw (C) Chondrichthyes: possess cartilaginous endoskeleton (D) Mammalia: give birth to young ones

Tardigrade Admin · Accepted Answer

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.

Q. 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

Chordata : possess a mouth provided with an upper and a lower jaw

Chondrichthyes: possess cartilaginous endoskeleton

Mammalia: give birth to young ones