Group of animals with a backbone or spine:

• Vertebrates

• Invertebrates

• Bears

• Worms

Group of animals that not have a backbone in their body.

• Ants

• Invertebrates

• Vertebrates

• Snakes

The animal kingdom is divided into two subgroups:

• Mammals and Reptiles

• Worms and Cnidarians

• Vertebrates and invertebrates

• Sponges and amphibians

The five classes in which vertebrates are classified are:

• Mammals, Birds,

• Fish, Arthropods

• Reptiles, amphibians,

• Fish

Are cold-blooded and live their whole life in the water; they have gills to take the oxygen from the water; fish have find and the body covered by scales, and they lay thousands of eggs at a time.

• Fish

• Ice

• Birds

• Mammals

Live part of their lives in the water and part on land; lay many eggs in the water; they have moist smooth skin, they have four legs.

• Pinguins

• Snakes

• Fish

• Amphibians

Have dry and thick skin covered with scales; they have four legs or may have not; usually ley eggs or live young; they have no ears, instead they have wholes; they are cold-blooded.

• Reptiles

• Fish

• Birds

• Worms

Group that have wings and feathers covering their body; they have hollow bones; have beaks and two legs; they are warm-blooded; wholes instead of ears.

• Eagle

• Birds

• Bats

• Dinosaurs

Have fur covering their body; they are warm blooded and most of them give birth to live young; female mammals produce milk to feed and nurse their babies; four legs and warm-blooded. Human kind belong to mammal’s classification.

• Birds

• Amphibians

• Reptiles

• Mammals

Is the internal skeleton that vertebrates have.

• Spine

• Endoskeleton

• Backbone

• Invertebrates