Name
Flatworm, Roundworm and Mollusk Test
True/False
Bubble in (a) for true/(b) for false.
1. There are 13000 species of flatworms.
2. Flatworms have a wide range of sizes.
3. Triploblastic organisms have four layers: ecotoderm, mesoderm, endoderm, thermoderm.
4. Flatworms are the simplest animals to have bilateral symmetry.
5. Roundworms have the first mouth-anus digestive tract.
6. Roundworms are segmented worms with flame cells.
7. Mollusks are classified by segmented body type, foot structure and shell arrangement.
8. Mantles secrete a protective shell.
9. Clams have an open circulatory system.
Determine whether the statement identifies a roundworm (a), flatworm (b), mollusk (c) or all (d).
10. Bilateral symmetry
11. Several organisms have adapted organs of adhesion.
12. Gas exchange occurs through gills, lungs or the mantle.
13. Triploblastic
14. Contain a shell which fossilizes easily.
15. Can cause heart failure, intestinal irritation or diarrhea
16. Body wall is a thickened cuticle.
17. Are in the Phylum Platyhelminthes.
18. Are in the Kingdom Animalia
19. Include both parasitic and free-living forms
20. Example: planaria
21. Example: cuttlefish
22. Example: clam
23. Example: lung fluke
24. Example: hookworm
25. Example: tapeworms
26. Contain a cloaca
27. Excretory system is made of flame cells
a.
b.
c.
d.
roundworm
flatworm
mollusk
all phyla
Matching:
a. Bilateral
b. coelom
c. radula
d. acoelomate
e. hydrostatic pressure
ab. open circulatory system
ac. Cephalization
ad. eyespots
ae. valves
bc. Flame cells
bd. gills
be. mantle
28. the process by which sensory organs and specialized appendages occur together in the head of the
animal
29. A body cavity in triploblastic animals lined with mesoderm
30. symmetry in an animal that can be divided down the middle into a mirrored right and left half
31. pressure exerted by a fluid, defined as force per unit area
32. a system without small blood vessels and capillaries
33. shells of typical bivalves
34. sensory organs in lower organisms that help the organism to see.
35. respiratory devices for animals that need to live and breathe underwater
36. specialized hollow excretory cells the contain a flagella, situated at the end of a tubule
37. Organisms that have no body cavity
38. Rough appendage used by some mollusks to scrape algae off of rocks
Diagram
Label the following organisms.
39.
Use these terms for
#s 39-43.
40.
41. What organism?
43.
42.
a. tapeworm
b. eyespot
c. pharynx
d. mantle
e. mouth/anus
ab. Ganglia
ac. Planarian
ad. Collar cell
ae. Flame cell
Name
Word Bank
(use for #s 44-50)
44.
45.
46.
47.
48.
a. Squid
b. Cuttlefish
c. Clam
d. Oyster
e. Snail
ab. Slug
ac. Octopus
ad. Planaria
49.
50.