Lab Practical Version A--key

Lab Practical Version A--key - Lab Practical Spring 2007...

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Lab Practical Spring 2007 Station 1 A— Planaria (on a slide); B—preserved earthworm; C—leech; D— Trematode (on slide) 1. Of all the worms here, animals B and C belong to the same phylum. What is present in animals B and C that differentiate them from the other two animals at this station? a. the presence of three tissue layers in B and C b. the presence of a coelom in B and C c. the absence of sexual reproduction in B and C d. the fact animals B and C are cephalized e. the presence of cnidocytes in B and C 2. The term “worm” as applied to all of these animals is a very good descriptive term. However, “worm” does not suggest a monophyletic grouping. Why? a. these animals don’t have homologous traits b. these animals inhabit habitats only worms can live in c. these animals are all deuterostomes d. these animals belong to different phyla e. these animals are all very closely related Station 2 A—chameleon; B—bony fish; C—curlew; D—shark; E—bat. 3. Historically animal C has been placed in its own class, but we now think this group of animals belongs to the same class as that of animal: a. A b. B c. DO NOT PICK C. THIS IS NOT A CHOICE. IF YOU PICK C YOU WILL GET THIS QUESTION WRONG. d. D e. E 4. Animals B and D belong to different classes. What is one trait they DO NOT have in common? a. their scales are derived from different tissue layers b. they have a different skeletal structure c. they are derived from a tetrapod body d. a post anal tail is present e. a vertebral column is present only in one 1
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Station 3 Earthworm Dissection: A—gizzard; B—clitellum; C—pharynx; D— intestine 5. What is the primary function of structure B ? a. reproduction b. nutrient absorption c. attachment to the substrate d. swimming e. respiration 6. Which structure is the intestine? a. A b. B c. C d. D e. none of these structures Station 4 A—fruit flies from lab 2; B—butterfly; C—beetle 7. Animal C belongs to the most diverse group of animals known. Because of this, any self respecting biologist should know that this animal belongs to the insect order: a. Diptera b. Coleoptera c. Odonata d. Hymenoptera e. Lepidoptera 8. What specialized structure do these animals use for oxygen transport? a. lungs b. book lungs c. gills d. trachea e. circulatory system 2
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Station 5 A—sand dollar star; B—sea urchin; C—sea star 9. Why are these animals placed into the same phylum? a. all possess an exoskeleton b. all possess a complete gut c. all possess a water vascular system d. all possess a coelom e. all possess the Aristotle’s Lantern 10. Although the phylum of these animals is a sister to our own, they are not cephalized. What indicates the absence of cephalization in these animals? a. they all lack a head
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This note was uploaded on 04/15/2008 for the course BIS 1b taught by Professor Kimsey during the Spring '08 term at UC Davis.

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Lab Practical Version A--key - Lab Practical Spring 2007...

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