Question

Match the columns :

Answer 1

Cartilaginous fishes belong to class Chondrichthyes. They have paired fins and jaws. The heart is paired and arranged in series. The skeleton is made up of cartilage.

Bony fishes have the bony covering on the gills is known as an operculum. The operculum that helps to pump water over their gills.

Amphibians can survive on land and water both. They are first vertebrates with amniotic legs. They have the three-chambered heart.

Reptiles are first vertebrates with amniotic eggs, i.e., extraembryonic membranes, like amnion, chorion, yolk sac and allantois are present. The yolk sac provides the nutrients to the developing embryo.