review for arthropds mollusks

appendages--molting-closed circulatory system--open circulatorysystem--crop-radula--exoskeleton-setae--gill--spiracle--gizzard-tube feet--mantle--water-vascular system--metamorphosis


1. Mollusk shells are secreted by the mantle.

2. As earthworms move through soil using their seatae, they take soil which is stored in the crop.

3. The exoskeleton covers and protects arthropod bodies.

4. Insects exchange oxygen and carbon dioxide through spiracles.

5. Tube feet act like suction cups and help sea stars move and feed.

6. Snails use a(n) water-vascular system to get food.

7. The blood of mollusks moves in a(n) open circulatory sytem.

8. What structure covers organs of mollusks?

A) gills      B) mantle

C) food     D) visceral mass


9. what structures do echinoderms use to move and to open shells of mollusks?
A) mantle    B) spines
C) calcium plates  D) tube feet


10. which organism has a closed circulatory system?
A) earthworm   B) slug
C) octopus     D) snail


11. What evidence suggests that arthropods might have evolved from annelids?
A) arthropods and annelids have gills.
B) both groups have species that live in water
C) segmentation is present in both groups
D) all segmented worms have setae





12. which of the following correctly describes the arthropod pictured above?
A) 3 body regions, 6 legs
B) 2 body regions, 8 legs
C) many body segments, 10 legs
D) many body segments, 1 pair of legs per segment


13.what type of arthropod is this animal?
A) annelid   B) insect
C) arachnid   D) mollusk


14. which is an example of an annelid?
A)earthworm    B) slug
C) octopus   D) snail


15. which sequence shows in complete metamorphosis?
A) egg-larvae-adult
B) egg-nymph-adult
C) larva-puppa-adult
D) nymph-pupa adult