Question

In which class do place an organism which has-

b.skeletons made of both bones and cartilage and are cold-blooded?

Answer 1

amphibians is boned and cartilaginous and cold blooded animals

Answer 2

Class Aves: They are warm blooded, lay eggs, 4 chambered heart and have covering of feathers.Class Reptilia: Cold blooded, having scales and breathe through lungs.