1. Choose the correct answer in each number.
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
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 and mantis
B. sand dollar, starfish and sea urchins
C. earthworm, leeches and 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. arachnids
D. insect
7. They are characterized as marine animals with spiny endoskeleton. They have water
vascular system, tube feet and radial symmetry as adult. Which group of invertebrates is being
described
A. mollusks
B. echinoderms
C. cnidarians
D. annelids
8. They have no tissue, no organ, and most have no symmetry,
A. sponges
B. echinoderms
C. cnidarians
D. annelids
9. Which group of invertebrates is divided into segments with a ringed appearance?
A. sponges
B. echinoderms
C. cnidarians
D. annelids​