Campbell Biology 8th Ed Test Bank
Chapter 33, Invertebrates
1) Which cells in a sponge are primarily responsible for trapping and removing food particles
from circulating water? A) choanocytes B) mesoglea cells C) pore cells (porocytes) D) epidermal
cells - ANS A Topic: Concept 33.1
Knowledge/Comprehension 2) Which of the following is correctly associated with sponges? A)
osculum B) body cavity C) cnidocytes D) spicules made of chitin E) muscle cells and nerve cells
- ANS A Topic: Concept 33.1
Knowledge/Comprehension 3) A spongeʹs structural materials (spicules, spongin) are
manufactured by the A) pore cells. B) epidermal cells. C) choanocytes. D) zygotes. E)
amoebocytes. - ANS E Topic: Concept 33.1
Knowledge/Comprehension 4) Which of these can be observed in the mesohyl of various
undisturbed sponges at one time or another? 1. amoebocytes 2. spicules 3. spongin 4. zygotes
5. choanocytes A) 1 only B) 1 and 2 C) 1, 2, and 3 D) 1, 2, 3, and 4 E) all five of these - ANS D
Topic: Concept 33.1
Knowledge/Comprehension 5) Which chemical is synthesized by some sponges and acts as an
antibiotic? A) streptomycin B) spongin C) calcium carbonate D) silica E) cribrostatin - ANS E
Topic: Concept 33.1
Synthesis/Evaluation 7) In terms of food capture, which sponge cell is most similar to the
cnidocyte of a Cnidarian? A) zygote B) choanocyte C) gamete D) epidermal cell E) pore cell -
ANS B Topic: Concepts 33.1-33.2
Knowledge/Comprehension 8) A radially symmetrical animal that has two embryonic tissue
layers probably belongs to which phylum? A) Porifera B) Cnidaria C) Platyhelminthes D)
Nematoda E) Echinodermata - ANS B Topic: Concept 33.2
Knowledge/Comprehension 9) Which of the following are characteristics of the phylum
Cnidaria? 1. a gastrovascular cavity 2. a polyp stage 3. a medusa stage 4. cnidocytes 5. a
pseudocoelom A) 1 and 4 B) 2 and 3 C) 2, 3, and 4 D) 1, 2, 3, and 4 E) all five of these - ANS D
Topic: Concept 33.2
Knowledge/Comprehension 10) Which of the following is true of members of the phylum
Cnidaria? A) They are not capable of locomotion because they lack true muscle tissue. B) They
, are primarily filter feeders. C) They have either or both of two body forms: mobile polyps and
sessile medusae. D) They may use a gastrovascular cavity as a hydrostatic skeleton. E) They
are the simplest organisms with a complete alimentary canal (two openings). - ANS D Topic:
Concept 33.2
Knowledge/Comprehension 11) The members of which class of the phylum Cnidaria occur only
as polyps? A) Hydrozoa B) Scyphozoa C) Anthozoa D) Cubozoa E) both B and D - ANS C
Topic: Concept 33.2
Knowledge/Comprehension 12) Which class of the phylum Cnidaria includes ʺjelliesʺ with
rounded (as opposed to boxlike) medusae? A) Hydrozoa B) Scyphozoa C) Anthozoa D)
Cubozoa E) Both A and C are referred to as ʺjellies.ʺ - ANS B Topic: Concept 33.2
Knowledge/Comprehension 692 Chapter 33, Invertebrates
13) Corals are most closely related to which group? A) jellies B) freshwater hydras C) sea
anemones D) sponges E) barnacles - ANS C Topic: Concept 33.2
Knowledge/Comprehension 14) Which characteristic is shared by both cnidarians and
flatworms? A) dorsoventrally flattened bodies B) flame bulbs C) radial symmetry D) a digestive
system with a single opening E) both A and D - ANS D Topic: Concepts 33.2, 33.3
Knowledge/Comprehension 15) Generally, members of which flatworm class(es) are
nonparasitic? A) Turbellaria B) Trematoda C) Cestoda D) Monogenea E) A, C, and D - ANS A
Topic: Concept 33.3
Knowledge/Comprehension 16) 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? A) Cestoda B) Monogenea C)
Turbellaria D) Trematoda - ANS C Topic: Concept 33.3
Application/Analysis 17) What would be the most effective method of reducing the incidence of
blood flukes in a human population? A) Reduce the mosquito population. B) Reduce the
freshwater snail population. C) Purify all drinking water. D) Avoid contact with rodent droppings.
E) Carefully wash all raw fruits and vegetables. - ANS B Topic: Concept 33.3
Application/Analysis 18) The larvae of many common tapeworm species that infect humans are
usually found A) encysted in freshwater snails. B) encysted in the muscles of an animal, such as
a cow or pig. C) crawling in the abdominal blood vessels of cows and pigs. D) encysted in the
human brain. E) crawling in the intestines of cows and pigs. - ANS B Topic: Concept 33.3
Knowledge/Comprehension 19) 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
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