Directions: Choose the letter of the best answer. Write your answer in your Science journal.

1. The largest group of invertebrates is the arthropod group, What do all arthropods have in common?

a. They live on land and have an exoskeleton.
b. They can fly and have jointed legs.
c. They have segmented bodies and jointed legs.
d. They have skeleton and segmented bodies.

2. Why do some mollusks have shells ?

a. So they can live both on land and water
b. To make it easier to find food
c. this as a reason why mollusks have shell
d. To protect their soft bodies

3. All of the following are hollow-bodied animals except ______.

a. corals
b. oyster
c. jellyfish
d. sea anemones

4. All invertebrates are animals that ___________.

a. have hard shells
b. have no backbone
c. have hollow bodies
d. live in the ocean

5. Which of these groups of animals belong to echinoderms?

a. bees, butterfly, mantis
b. sand dollar, starfish, sea urchins
c. earthworm, leeches, tapeworm
d. spider, ticks and scorpion

6. To what subgroup of arthropods do invertebrates with four pairs of legs belong?
a. echinoderms
b. crustaceans
c. arachinids
d. insect​