The science of organizing categories for living things.

An aquatic animal having gills, fins, and a body covered with scales.

A mammal that lays eggs

Name a kind of worm.

These are the most numerous animal group on Earth.

An animal that has a backbone.

An animal that spends part of its life in the water and part of its life on land.

A pouched mammal

Frogs and salamanders are this.

Snails, clams, and squids are this.

An animal that does not have a backbone.

An animal with two legs, two wings, feathers, and hollow light weight bones.

A mammal that develops within its mother.

Lizards, snakes, and turtles are this.

Echinoderms have these of feet.

An animal with a constant body temperature.

A true land animal with one or two lungs, they usually have thick, scaly, waterproof skin.

Cnidarians, like jellyfish and sea anemones have this kind of symmetry.

A platypus is an example of this.

Sharks and rays are these kind of fish.

An animal that cannot regulate its own body temperature.

An animal that produces milk, has hair or fur, and large brains.

A worm would have this kind of symmetry?

Kangaroos are examples of this.

These fish have a nerve cord covered by bone.