Which class of animals is the largest? Arthropods Which class of animals is covered with hair? Mammals How many main classes of animals are there? Six Snakes, turtles and crocodiles belong to which class of animals? Reptiles What one physical characteristic makes a bird a bird? Feathers Which class of animals is warm blooded and drink milk? Mammals Which class of animals has fins and scales? Fish Which class of animals is covered with feathers? Birds What are the names of the six main animal classes? Mammals, Birds, Fish, Reptiles, Amphibians, Arthropods Which class of animals has jointed legs and an exoskeleton? Arthropods Which class of animals is born from hard-shelled eggs? Birds Which class of animal breathes through gills? Fish Which class of animals has scaly skin? Reptiles Which class of animals is born in the water but later lives on land? Amphibians Which class of animal can live almost anywhere? Mammals Which class of animals is cold-blooded and born on land? Reptiles How do reptiles give birth? They lay eggs Spiders, insects and crabs all belong to which class of animal? Arthropods Which class of animal is born with gills that later become lungs? Amphibians Which class of animals can sweat? Mammals When a group of animals are alike in important ways, they are said to be part of the same_______? Class Which class of animals has segmented bodies? Arthropods Which 2 classes of animals lay eggs? Birds and Reptiles