ch 33 TH - ch 33 2008 Multiple Choice Identify the choice...

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ch 33 2008 Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Which of the following are not associated with sponges? a. oscula b. spongocoels c. cnidocytes d. spicules e. amoebocytes ____ 2. Which of these factors, when used to label the horizontal axis of the graph in the figure below, 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 amoebocytes per sponge d. number of spicules per sponge e. number of choanocytes per sponge ____ 3. A radially symmetrical animal that has two embryonic tissue layers belongs to which phylum? a. Porifera b. Cnidaria c. Platyhelminthes d. Nematoda e. Echinodermata ____ 4. All of the following are characteristics of the phylum Cnidaria except a. a gastrovascular cavity. b. a polyp stage. c. a medusa stage. d. cnidocytes. e. a pseudocoelom. ____ 5. The members of which class of the phylum Cnidaria occur only as polyps?
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a. Hydrozoa b. Scyphozoa c. Anthozoa
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ch 33 TH - ch 33 2008 Multiple Choice Identify the choice...

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