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Chapter 33 Invertebrates Multiple- Choice Questions 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 Answer: A Topic: Concept 33.1 Skill: 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 Answer: A Topic: Concept 33.1 Skill: Knowledge/Comprehension 3) A sponge ʹ s structural materials (spicules, spongin) are manufactured by the A) pore cells. B) epidermal cells. C) choanocytes. D) zygotes. E) amoebocytes. Answer: E Topic: Concept 33.1 Skill: 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 Answer: D Topic: Concept 33.1 Skill: Knowledge/Comprehension Page 1 5) Which chemical is synthesized by some sponges and acts as an antibiotic? A) streptomycin B) spongin C) calcium carbonate D) silica E) cribrostatin Answer: E Topic: Concept 33.1 Skill: Knowledge/Comprehension Figure 33.1 6) Which of these factors, when used to label the horizontal axis of the graph in Figure 33.1, would account most directly for the shape of the plot? A) spongin concentration (gm/unit volume) B) rate of cribrostatin synthesis (molecules/unit time) C) number of pores per sponge D) number of spicules per sponge E) number of choanocytes per sponge Answer: E Topic: Concept 33.1 Skill: 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 Answer: B Topic: Concepts 33.1- 33.2 Skill: Knowledge/Comprehension Page 2 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 Answer: B Topic: Concept 33.2 Skill: 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 Answer: D Topic: Concept 33.2 Skill: 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.... View Full Document

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