Understanding Invertebrates

What percentage of all animal species are invertebrates?

• 97%

• 50%

• 75%

• 25%

Which of the following is NOT a characteristic of arthropods?

• Soft body

• Exoskeleton

• Jointed legs

• Three body parts

Which group of invertebrates includes snails, clams, and octopuses?

• Mollusks

• Arthropods

• Cnidarians

• Worms

What role do earthworms play in the ecosystem?

• They help make soil healthy by eating dead plants.

• They sting with their tentacles.

• They build coral reefs.

• They change color to avoid predators.

What is a common feature of cnidarians like jellyfish?

• They have soft, jelly-like bodies and can sting with their tentacles.

• They have a hard outer shell called an exoskeleton.

• They have jointed legs.

• They have three body parts.