SECTION (Biol.201), Spr 2000
Dr. Kathy S. Williams (email email@example.com)
Return to Invertebrate
Return to Syllabus
REVIEW QUESTIONS for Biology 201, Spring 2000.
Use these questions to help you focus on major points of this section.
Consider them examples of exam questions.
Note that while this list is pretty comprehensive; it is not intended
to include everything that might be on the exam. In general, consider the
questions as "guides" to specific topics in the notes I consider important.
If a question asks for some examples of a particular topic, that means
you should also understand the topic in addition to the examples. The point
is that you may need to know more than the answers to just these particular
questions to do well on the exam ó consider these questions a study guide.
See me or your TA if you have questions about any of the material. K.Williams
1. List characteristics that distinguish animals from organisms in the
other 4 kingdoms.
2. In Porifera, which type of cell has flagella?
a. epidermal cells
3. Distinguish between radial and bilateral symmetry. Name 2 taxa that
have radial symmetry.
b. collar cells or choanocytes
d. amoeboid cells or amoebocytes
e. pore cells or porocytes
4. List characteristics shared by bilaterally symmetrical animals.
5. Which is not characteristic of animals with bilateral symmetry?
a. they move about actively
d. most have sexual reproduction
6. What distinguishes a diploblastic animals from a triploblastic animal?
b. they are sessile or slow-moving animals
e. most have a coelom
7. What type of digestive system does an anemone have?
8. Give one difference between a medusa & a polyp.
9. Which class within the Cnidaria is important geologically because
the growth of its members can result in the formation of islands and atolls
in tropical oceans?
a. Hydrozoa b. Scyphozoa
c. Anthozoa d. Turbellaria
10. Which of the following is not associated with members of the
a. alternation between polyp and medusa
d. three distinct tissue layers
11. Explain the advantage of sexual reproduction.
b. gastrovascular cavity
e. planula larva
11. Explain how asexual reproduction may be advantageous for a population
of organisms living in a stable, favorable environment.
13. Explain the function of excretory organs and give one example.
14. Explain the similarities and difference among: protonephridia (flame
bulbs), metanephridia, and Malpighian tubules.
15. Name 2 taxa that have a hydrostatic skeleton.
16. Name one adaptation (i.e., novel or modified character/feature)
thatís typical of parasites.
17. The digestive system and the excretory system of free-living Platyhelmenthes
(i.e. Turbellaria) extend quite extensively throughout the body. Which
of these would serve as an explanation for this phenomenon?
a. Turbellaria has complex kidneys and accessory organs of digestion.
18. Which of the following is not associated with a parasitic lifestyle
as seen in Cestoda and Trematoda?
b. This may be compensation for the fact that they do not have a circulatory
c. These systems are making up for the fact that Turbellaria do not
have a nervous system.
d. They are worms and worms do not have complete digestive tracts.
e. All of these are explanations.
a. complex digestive systems
d. life cycles with multiple hosts
19. Explain an advantage of hermaphrodism, compared to having distinct,
separate sexes (i.e., being dioecious).
b. flattened body
e. reduced gastrovascular cavity
c. extensive reproductive organs
20. Which group(s) of animals includes parasitic forms?
a. Nemertea b. Platyhelmenthes
c. Nematoda d. both a.
and b. e. both b. and c.
21. Define pseudocoelom. Distinguish acoelomate, pseudocoelomate, and coelomate.
22. The presence of a coelom is advantageous because
a. it is the third germ layer.
23. Which of the following types of organisms are sessile filter feeders,
lack tissues, and are classified according to the type of spicules they
b. it permits development of an open circulatory system.
c. it provides a space for the development of internal organs.
d. it is necessary for a digestive system.
e. it functions in performing excretion.
a. Cnidaria b. Porifera
c. Platyhelmenthes d. Nematoda
24. Distinguish between spiral and radial cleavage, determinant and indeterminate
cleacage, schizicoelous & enterocoelous.
25. Distinguish among the following 4 taxa of Mollusca and give examples
26. Which of the following features distinguishes the class Gastropoda
from other Mollusca?
a. a radula b. torsion
c. complex eyes d. a single
calcareous shell e. gills
27. Describe one advantage and one disadvantage of possessing an exoskeleton.
Specify 2 taxa that possess exoskeletons.
28. Describe two characteristics or traits of Cephalopoda that contribute
to their lifestyle as predators.
29. Name and describe two different structures used for excretion by
30. Members of Mollusca look very different, yet we know they are related
because they all
a. are segmented.
d. have a mantle, visceral mass, and foot.
31. Mollusca and Annelida differ in that:
b. are predators.
e. both b. and d.
c. have an external skeleton.
a. annelids are segmented, whereas mollusks are not segmented.
32. Which one of the following phyla has a circulatory system, a complete
digestive system, and a reduction of the coelom?
b. annelids have a coelom, whereas mollusks do not.
c. annelids are protostomes, whereas mollusks are deuterostomes.
d. annelids have open circulatory systems, but mollusks have closed
e. mollusks have trocophore larvae, whereas annelids do not.
a. Rotifera b. Annelida
c. Mollusca d. Nematoda
33. What is one advantage that complete digestive tracts have over gastrovascular
34. List 2 animal taxa with gastrovascular cavities and explainw why
they do not need a circulatory system.
35. Distinguish between a gastrovascular cavity and a complete digestive
tract. Give one example of animals with each.
36. Distinguish between open and closed circulatory systems. Explain
hemolymph movement in an open circulatory system.
37. Tell what characters distinguish arthropods from all other animals.
38. Distinguish among the following arthropods and be able to explain
which is more closely related to which: Crustacea, Chelicerata, Uniramia,
39. You can identify the following insects from insects by single characters
of their wings. Match the following insect taxa with their wing characteristics.
| a. have only one pair of membranous wings
40. Give two major features (novel derived characters) of insects that
contributed to their tremendous diversification (evolution of so many species).
| b. have hardened front wings
| c. have scales on their wings
| d. have no wings as adults
| e. have wings but cannot fly
41. Distinguish between complete and incomplete metamorphosis in insects
and give one example of an insect that has each type of development.
42. Give one evolutionary link between the Annelida and Arthropoda
(in other words, what character indicates that they have a more recent
common ancestor than Mollusca and Arthropoda).
43. Distinguish between a hemocoel and coelom.
44. Explain what a hydrostatic skeleton is and give an example of an
animal that has that body support system.
45. Explain one arthropod feature that was a preadaptation for living
46. Is internal fertilization more of an advantage for life on land
or life in the sea? Explain your response.
47. Which group of animals contains animals with jointed appendages?
a. Mollusca b. arthropods
c. Annelida d. chitons
e. all of these
48. Which of the following groups has a water vascular system?
a. Mollusca b. Crustacea
c. Annelida d. Echinodermata
e. both a. and d.
49. Describe the structures and function of a water vascular system, including
ring canal, radial canal, tube feet and ampula.
50. Disitinguish among the major groups of echinoderms (classes) and
give examples of each.
51. Which of the following statements is not true?
a. Echinoderms have a coelom.
d. Echinoderms have a stomach.
52. Which animal exhibits the greatest degree of cellular plasticity, that
is, the ability of a cell to change its structure and function to be like
any other cell in the organism?
b. Echinoderms are radially symmetrical as adults.
e. both c. and d.
c. Echinoderms are radially symmetrical as larvae.
a. Porifera b. Platyhelmenthes
c. Echinodermata d. Cnidaria
53. Which of these features for gas exchange is MISMATCHED?
a. epidermis - Platyhelmenthes
d. trachea - Annelida
54. Which of these is MISMATCHED?
b. mantle cavity - terrestrial Gastropoda
e. book lung - Arachnida
c. gills - Crustacea
a. ventral solid nerve cord - Annelida
d. ladder-type nervous system - Platyhelmenthes
55. List distinguishing characteristics (aphomorphies) of Cnidaria, Platyhelmenthes,
Nematoda, Mollusca, Annelida, Crustacea, Chelicerata, Uniramia, Echinodermata.
b. nerve net - Cnidaria
e. both a. and c.
c. dorsal hollow nerve cord - Crustacea
56. Which groups contain animals with a complete digestive tract?
a. arthropods & Nematoda
d. arthropods, Annelida, & Platyhelmenthes
57. You discover an animal with bilateral symmetry, a pseudocoelom, a tubular
digestive system, and a thick multilayer cuticle. Select the group to which
this animal most likely belongs.
b. arthropods & Annelida
e. arthropods, Annelida, & Nematoda
c. arthropods, Annelida, Nematoda, & Platyhelmenthes
a. Nemertea b. Insecta
c. Nematoda d. Rotifera