Invertebrates MCQs Quiz Multiple Choice Questions & Answers

1. Which cells in a sponge are primarily responsible for trapping and removing food particles from circulating water?

1. choanocytes
2. mesoglea cells
3. pore cells (porocytes)
4. epidermal cells

2. Which of the following is correctly associated with sponges?

1. osculum
2. body cavity
3. cnidocytes
4. spicules made of chitin

3. A sponges structural materials (spicules, spongin) are manufactured by the

1. pore cells.
2. epidermal cells.
3. choanocytes.
4. amoebocytes.

4. Which of these can be observed in the mesohyl of various undisturbed sponges at one time or another?1. amoebocytes2. spicules3. spongin4. zygotes5. choanocytes

1. 1 only
2. 1 and 2
3. 1, 2, and 3
4. 1, 2, 3, and 4

5. Which chemical is synthesized by some sponges and acts as an antibiotic?

1. streptomycin
2. spongin
3. calcium carbonate
4. cribrostatin

6. In terms of food capture, which sponge cell is most similar to the cnidocyte of a Cnidarian?

1. zygote
2. choanocyte
3. gamete
4. epidermal cell

7. A radially symmetrical animal that has two embryonic tissue layers probably belongs to which phylum?

1. Porifera
2. Cnidaria
3. Platyhelminthes
4. Nematoda

8. Which of the following are characteristics of the phylum Cnidaria?1. a gastrovascular cavity2. a polyp stage3. a medusa stage4. cnidocytes5. a pseudocoelom

1. 1 and 4
2. 2 and 3
3. 2, 3, and 4
4. 1, 2, 3, and 4

9. Which of the following is true of members of the phylum Cnidaria?

1. They are not capable of locomotion because they lack true muscle tissue.
2. They are primarily filter feeders.
3. They have either or both of two body forms: mobile polyps and sessile medusae.
4. They may use a gastrovascular cavity as a hydrostatic skeleton.

10. The members of which class of the phylum Cnidaria occur only as polyps?

1. Hydrozoa
2. Scyphozoa
3. Anthozoa
4. Cubozoa

11. Which class of the phylum Cnidaria includes?jellies?with rounded (as opposed to box like medusae?)

1. Hydrozoa
2. Scyphozoa
3. Anthozoa
4. Cubozoa

12. Corals are most closely related to which group?

1. jellies
2. freshwater hydras
3. sea anemones
4. sponges

13. Which characteristic is shared by both cnidarians and flatworms?

1. dorsoventrally flattened bodies
2. flame bulbs
3. radial symmetry
4. a digestive system with a single opening

14. Generally, members of which flatworm class(es) are nonparasitic?

1. Turbellaria
2. Trematoda
3. Cestoda
4. Monogenea

15. In a small stream, you pick up a rock and observe many small, flattened worms crawling on its undersurface.You decide that they belong to the phylum Platyhelminthes. To which class do they probably belong?

1. Cestoda
2. Monogenea
3. Turbellaria
4. Trematoda

16. What would be the most effective method of reducing the incidence of blood flukes in a human population?

1. Reduce the mosquito population.
2. Reduce the freshwater snail population.
3. Purify all drinking water.
4. Avoid contact with rodent droppings.

17. The larvae of many common tapeworm species that infect humans are usually found

1. encysted in freshwater snails.
2. encysted in the muscles of an animal, such as a cow or pig.
3. crawling in the abdominal blood vessels of cows and pigs.
4. encysted in the human brain.

18. While vacationing in a country that lacks adequate meat inspection, a student ate undercooked ground beef.Sometime later the student became easily fatigued, and lost body weight. At about the same time, whitish,flattened, rectangular objects full of small white spheres started appearing in his feces. Administration of niclosamide cured the problem. The student had probably been infected by a

1. pinworm.
2. hookworm.
3. nematode.
4. tapeworm.

19. Which of the following correctly characterizes the phylum Rotifera?

1. a single-opening digestive tract
2. a pair of mandibles made of chitin
3. parthenogenic reproduction
4. inability to persist in environments where they might undergo desiccation

20. Which of the following statements about tapeworm feeding methods is correct?

1. They have complete digestive tracts.
2. They use degenerate mouths to ingest some of their food.
3. They absorb nutrients across their body walls.
4. They are autotrophic.

21. While sampling marine plankton in a lab, a student encounters large numbers of fertilized eggs. The studentrears some of the eggs in the laboratory for further study and finds that the blastopore becomes the mouth. Theembryo develops into a trochophore larva and eventually has a true coelom. These eggs probably belonged toa(n)

1. chordate.
2. echinoderm.
3. mollusc.
4. nematode.

22. A lophophore is used by ectoprocts and brachiopods

1. for locomotion.
2. at a larval stage.
3. for feeding.
4. for sensory reception.

23. A brachiopod can be distinguished from a bivalve by the presence of

1. two hinged shells.
2. a digestive system with separate mouth and anus.
3. a lophophore.
4. suspension feeding.

24. If a lung were to be found in a mollusc, where would it be located?

1. mantle cavity
2. coelom
3. foot
4. visceral mass

25. Which molluscan class includes members that undergo embryonic torsion?

1. chitons
2. bivalves
3. gastropods
4. cephalopods

26. A terrestrial mollusc without a shell belongs to which class?

1. chitons
2. bivalves
3. gastropods
4. cephalopods

27. Which molluscan class includes marine organisms whose shell consists of eight plates?

1. chitons
2. bivalves
3. gastropods
4. cephalopods

28. A radula is present in members of which class(es)?

1. chitons
2. bivalves
3. gastropods
4. cephalopods

29. While snorkeling, a student observes an active marine animal that has a series of muscular tentacles bearing suckers associated with its head. Segmentation is not observed, but a pair of large, well-developed eyes is evident. The student is observing an animal belonging to which class?

1. chitons
2. bivalves
3. gastropods
4. cephalopods

30. Which molluscan class includes organisms that are primarily suspension feeders?

1. chitons
2. bivalves
3. gastropods
4. cephalopods

31. Of the annelid classes below, which have parapodia?

1. Oligochaeta
2. Polychaeta
3. Hirudinea (leeches)
4. all three of these

32. Many of which of the following annelid classes are parasites?

1. Oligochaeta
2. Polychaeta
3. Hirudinea (leeches)
4. all three of these

33. Of the annelid classes below, which have externally segmented bodies?

1. Oligochaeta
2. Polychaeta
3. Hirudinea (leeches)
4. all three of these

34. Of the annelid classes below, which make castings that are agriculturally important?

1. Oligochaeta
2. Polychaeta
3. Hirudinea (leeches)
4. all three of these