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Animal Diversity Midterm & Key A Sum09

Animal Diversity Midterm & Key A Sum09 - BSC 2011-L...

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BSC 2011-L - Animal Diversity Midterm Lecture Exam – Form A Summer 2009 Name, please: _____________________________ Please select the single best choice to answer each of the following questions. 1. _____, or “water bears”, are among the tiniest animals on earth and can withstand the harshest conditions by turning into a dessicated (dehydrated), resistant form called a ___. A. rotifers; tun B. rotifers; gemmule C. branchiopods; gemmule D. tardigrades; tun E. onycophorans; tun 2. In the figure below, which letter indicates the ventral side of the cat? _____ 3. The majority of animal species are found in the phylum _____. A. Metazoa B. Cnidaria C. Annelida D. Arthropoda E. Platyhelminthes 4. A circulatory system, either open or closed, is absent in ____. A. spiders B. flatworms C. earthworms D. nemerteans E. barnacles 5. The Eumetazoa is defined as animals having _____. A. multiple cells B. a coelom C. organs D. a complete gut E. tissues 6. What best characterizes an ecdysozoan? A. an animal that has a larval stage B. an animal that has alternating sexual and asexual stages C. an animal that has feeding appendages D. an animal that is dioecious E. an animal that molts its cuticle 7. Siphonoglyphs and acontia are structures associated with ___. A. sea anemones B. tardigrades C. rotifers D. gastrotrichs E. entoprocts 8. Let’s all hope that T-Bone doesn’t get infected with hookworms, heartworms, pinworms or trichina worms – all examples of _____. A. parasitic annelids B. parasitic flatworms C. parasitic trematodes D. parasitic nematodes E. parasitic cestodes 9. How would you distinguish a relatively “advanced” crustacean from a crustacean species that evolved much earlier? A. the advanced species would show many similar, repetitive appendages along its body B. the advanced species would shed its cuticle C. the advanced species would exhibit more tagmosis D. both A and B apply E. choices A, B and C apply 10. Which of the following is NOT characteristic of protostomes? A. the embryonic blastopore becomes the mouth in the adult form B. cell cleavage in the blastula is spiral C. a coelom, if present, forms via enterocoely D. mesoderm forms at the blastopore lip E. early embryonic cell fate is determinate
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11. New “segments” are added to a growing annelid just anterior to the _____. A. pygidium B. prostomium C. notopodium D. parapodium E. peristomium 12. The flexible “joints” in the walking leg of a crab arise from thin exoskeletal areas called _____. A. acicular membranes B. arthrodial membranes C. apodeme membranes D. syncytial membranes E. coxal membranes 13. If an animal is a pseudocoelomate, _____. A. it lacks mesoderm B. it lacks a gut cavity C. the gut cavity provides hydrostatic skeletal support D. mesoderm lines the outer edge of the blastocoel E. it has a tissue level of organization Please use the figure below to answer the next TWO questions: 14. Which of the above (A, B or C) represents a syconoid type of sponge architecture? ____ 15.
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