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Practice Questions Supplemental Instruction Iowa State University Leader: Tyler Course: Biology 211 Instructor: Rice Date: 57. Platyhelminthes differ from cnidarians in that platyhelminthes have ____, which is not found in cnidarians. a) an anus that develops from the blastopore b) three germ layers c) true tissues d) radial symmetry e) a true coelom 73. Molluscs do not have a single common body plan. Despite this, all mollusks have which of the following? a) a beak b) fins c) a foot d) a radula e) Both C and D 59. In animals, bilateral symmetry is correlated with _____. a) an ability to attach to a host organism b) the presence of a skeleton c) adaptation to terrestrial environments d) cephalization e) an ability to swim 74. Gastropods, bivalves and cephalopods all have a _______ that secretes the shell. a) foot b) mantle c) gill d) visceral mass e) chromophore 60. In a parasitic life cycle, sexual reproduction occurs ___ . a) in the intermediate host b) outside of the host’s body c) in final/terminal host d) None are true; parasites do not reproduce sexually e) Both A and B are correct 61. Generally speaking, members of which class(es) of flatworms are not parasites? a) Turbellaria b) Trematoda c) Cestoda d) Monongena e) both a & b 63. Which of the following statements about tapeworm feeding is correct? a) they have complete digestive tracts b) they ingest food with their mouths c) As adults they live and feed in their hosts blood stream d) They are autotrophic e) They absorb nutrients through their body wall 66. In parasitic platyhelminthes, most of the body cavity is filled with______. a) gastrovascular cavity b) reproductive organs c) sensory organs d) a pharynx e) segmentation 76. Molluscs differ from nematodes in that mollusks have _____, which is not found in nematodes. a) bilateral symmetry b) three germ layers c) an anus that develops from the blastopore d) true tissues e) a body cavity completely lined with mesoderm tissue 78. Which of the following is not a trait of cephalopods? a) modified foot used to grasp prey b) closed circulatory system c) gastrovascular cavity d) beak to tear prey e) mantle 81. In Iowa, freshwater bivalves have a parasitic larval stage. How is parasitism used by this group of organisms? a) The larvae are dispersed by fish hosts b) The larvae feed on the blood of their hosts c) The larvae reproduce sexually on their hosts d) The larvae reproduce asexually on their hosts e) The larvae need fish as an intermediate host before moving to a final host 82. The animal phylum ________ has a true coelom, complete digestive track and segmentation. a) Annelida b) Platyhelminthes c) Nematoda d) Mollusca e) Arthropoda 83. Annelids are characterized by all of the following except ____. a) a hydrostatic skeleton b) segmentation c) a complete digestive system d) some parasitic species e) a cuticle made of chitin 87. Which of the following annelid classed produce a blood anti-coagulent ? a) Oligochaeta b) Polychaeta c) Hirudinea d) all three e) Both b and c 89. Which of the following is NOT a characteristic of all Ecdysozoa? a) protostomes b) ability to molt periodically when growing c) jointed appendages d) bilaterally symmetric e) exoskeletons 90. Which group contains both ecdysozoans and lophotrochozoans? a) Deuterostomes b) Protostomes c) Arthropoda d) Chordata e) Both A and D are correct 93. What function is shared between an exoskeleton and an endoskeleton? a) a site for muscle attachment b) prevents water-loss c) provides protection d) important for respiration e) requires periodic shedding for organismal growth 96. Which of the following is false about Nematodes? a) Nematodes play an important role in decomposition. b) Nematodes have a pseudocoelom. c) Nematodes have a complete digestive system. d) Some nematode species are parasites. e) None of the above; all are true 97. Which of the following characteristics do nematodes share with fungi? a) Both play an important role in decomposition. b) Both have cell walls. c) Both have structures made of chitin d) Both A and B are correct e) Both B and C are correct 99. Which of the following are characteristics of arthropods? I. protostome development II. bilateral symmetry III. a pseudocoelom IV. three embryonic germ layers V. a closed circulatory system a) I, II b) I, II, IV c) II, III d) II, III, V e) III, IV, V 101. The most successful group (contains the greatest number of species) in the Arthropoda is __. a) Chelicerata b) Myriapoda c) Hexapoda/Insecta d) Crustacea e) Cephalopoda 103. Among arthropods, only ________ possess specialized mouthparts that were a major adaptation for their radiation and diversification. a) Myriapoda b) Chelicerata c) Gastropoda d) Hexapoda/Insecta e) Crustacea 136. Earthworms (Phylum Annelida) are ecologically important because they: a) Recycle organic matter by eating it. b) Produce mineral-rich casts. c) Aerate the soil when making tunnels. d) Both A and C e) All statements are true. 137. Which phylum is diploblastic? a) Cnidaria b) Nematoda c) Platyhelminthes d) Poriferia e) Echinodermata 138. _________ are acoelomate protostomes that are flattened dorsoventrally. a) Mollusca b) Annelida c) Platyhelminthes d) Nematoda e) Echinodermata 140. The animal phylum ________ are pseudocoelomates, have complete digestive tract and molt. a) Annelida b) Platyhelminthes c) Nematoda d) Mollusca e) Arthropoda 144. Which molluscan class includes snails? a) Turbellaria b) Bivalvia c) Gastropoda d) Cephalopoda e) None of the above; snails are not molluscs 145. Which of the following pairs are incorrect? a) cephalo = head b) gastro = stomach c) poda = foot d) bi = divided e) valvia = shell 146. Which of the following pairs are incorrect? a) meso = inside b) gastro = stomach c) poda = foot d) arthro = jointed e) coel = cavity 142. Which of the following descriptions is incorrect a) Echinodermata – bilateral symmetry as larvae, coelom present b) Nematoda – roundworms, pseudocoelomate c) Cnidaria – radial symmetry, polyp and medusa body 147. Which of the following pairs are incorrect? forms a) ecto = layer d) Platyhelminthes – flatworms, gastrovascular cavity, b) gastro = stomach acoelomate c) poda = foot e) Annelida – segmented worms, gastrovascular cavity, d) meso = middle coelom present e) coel = cavity 67. Using the life cycle of the liver fluke, please answer the following question. Which is the final/terminal host? a) snail b) cow c) sheep d) human e) B, C, and D are all final hosts