ECOL_182_Exam1 - MIDTERM EXAM 1 Robichaux Section 7...

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1 MIDTERM EXAM 1 Robichaux Section 7 February 2008 YOUR NAME: ____________________________________________________________ Last name First name YOUR UA NetID: ______________________________ YOU MUST CHOOSE THE SINGLE BEST ANSWER FOR EACH QUESTION. YOU MUST USE A NUMBER 2 PENCIL . On a trip to the Great Barrier Reef, you discover five different kinds of animals. As indicated in questions 1-5, the animals exhibit different suites of characters that you use to identify them. 1. The first animal has a fluid-filled body cavity, a water vascular system with tube feet, and an endoskeleton of calcareous plates. The animal most likely is a. a mollusk. b. a chordate. c. an echinoderm. d. a tetrapod. 2. The second animal has a cellular level of organization and choanocytes. The animal most likely is a. a sponge. b. an arthropod. c. an amniote. d. a cnidarian. 3. The third animal has a segmented body plan with a jointed exoskeleton and exhibits bilateral symmetry. The animal most likely is a. an echinoderm. b. a vertebrate. c. an arthropod. d. a chordate. 4. The fourth animal has radial symmetry and a body plan with an outer ectoderm, mesoglea, and an inner endoderm. The animal most likely is a. a cnidarian. b. a chordate. c. an echinoderm. d. a sponge. 5. The fifth animal has an organ level of organization and a body plan with a foot, visceral mass, and mantle. The animal most likely is a. a tetrapod. b. an echinoderm. c. an arthropod. d. a mollusk. 6. Based on the discussion in lecture, chordates exhibit which of the following traits at some stage during development? a. nematocysts b. choanocytes c. pharyngeal slits d. a and c, but not b e. none of the above
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2 7. Based on the discussion in lecture, amniotes exhibit which of the following traits? a. a kidney capable of excreting concentrated urine b. a skin covering the body that is very permeable to water c. an egg with both a shell that is relatively impermeable to water and a large yolk that nourishes the embryo d. all of the above e. a and c, but not b. 8. Based on the discussion in lecture, the basic vertebrate body plan includes a. internal organs suspended in a coelom. b. a well-developed circulatory system driven by contractions of a ventral heart. c. an anterior skull with a large brain. d. all of the above e. b and c, but not a. 9. On a trip to Tahiti, you collect the following animals: sea stars, corals, shrimp, sea urchins, scorpions, and salamanders. Which of the following animal groups is NOT represented in your collection? a. echinoderms b. cnidarians c. mollusks d. arthropods e. tetrapods 10. The principal cells of the nervous system are neurons. In neurons, a. the dendrites are bushlike projections that bring information from other neurons or sensory cells to the cell body. b.
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This note was uploaded on 04/29/2008 for the course ECOL 182r taught by Professor Schaffer during the Spring '08 term at University of Arizona- Tucson.

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ECOL_182_Exam1 - MIDTERM EXAM 1 Robichaux Section 7...

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