Unit 3 Test Vocabulary

Front

What is a hard, outer skeleton that surrounds an animal's body?

Back

Exoskeleton

Front

What do we call an animal without a backbone, such as an insect?

Back

Invertebrate

Front

What are long sensory organs on an arthropod's head called?

Back

Antennae

Front

What is a mollusk with a shell made of two parts of valves, such as an oyster or mussel?

Back

Bivalve

Front

What is the umbrella-shaped, swimming stage in the life cycle of jellyfish and other cnidarians?

Back

Medusa

Front

What is the term for the life stages an organism goes through from birth to adulthood?

Back

Life Cycle

Front

What type of animal has a backbone?

Back

Vertebrate

Front

What is the name of the hard outer covering that protects some animals, like crabs?

Back

Shell

Front

What is the term for animals that have a soft body and are often found in water, like snails?

Back

Mollusk

Front

What do we call the group of animals that includes starfish and sea urchins?

Back

Echinoderm