Vertebrates are known to be animals with backbones. The following are the evolutionary changes of vertebrates:
*Jaws - Fishes before sucked and rubbed on their preys but now, they already have jaws that enable them to more efficacious in getting their preys.
*Lungs and limbs - Animals on the sea need to adapt when they look for their preys on land, in turn, they had evolved to acquiring lungs for breathing and limbs for moving.
*Endothermy - ‘Endo’ meaning internal and ‘therm’ meaning temperature. This gave animals’ bodies heat supply from burning the food they eat.