Which word does not relate to the others?

The prefix ‘Therm’ means

Another name for vertebrates is

Fish use these to breathe

If our internal body temperature stays the same we are?

Our internal skeleton ____ and ____ our body and organs.

This helps fish to maintain constant depth in the water.

This structure in the back usually hardens into the backbone of vertebrates.

Amphibians are used as a ____ ____ to tell us the health of our environment.

In Greek terms chondros means what?

In Greek terms icthyes means what?

In Greek terms amphibious means what?

In Greek terms osteon means what?

In Greek terms agnatha means what?

Animals with a short broad body and strong hind legs are?

A legless reptile that can unhinge it's jaw is?

An extinct reptile is?

A rough skinned reptile with lots of teeth and a rounded snout is?

An animal that lives in water and has fins and gills is?