An animal that has a spine or backbone

These are warmblooded, lay eggs, have feathers, and may or may not fly

To arrange or group by classes or categories

Having a body temperature that changes along with the temperature of surroundings

An organism that obtains energy by feeding on other organisms

An organism that breaks down wastes and dead organisms

A cold-blooded vertebrate with gills and fins

An animal that does not have a backbone

Animals that are warm-blooded, have hair or fur, and produce milk for their young

Any living thing

An organism that CAN make its own food

To make more of something

A vertebrate with scaly skin that lays eggs; some have a tough, leathery covering on their body

An animal WITH a backbone or spine

Having a body temperature that stays the same, regardless of the surrounding temperature

The broadest level of biological classification

A tool used to identify organisms based on characteristics