Lab_08_Worksheet_Key

Lab_08_Worksheet_Key - b. Cheliped Grasping food, offense,...

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NAME _______KEY ___________ SECTION ______ EFB285 - ZOOLOGY LAB LAB 8 1. Why do crayfish spend a lot of time immobile and hiding following molting? The exoskeleton is still stretching and hardening, so they are more vulnerable to predation 2. What is the principle of serial homology? The correspondence in the same individual of repeated structures having the same origin and development. Appendages are homologous to one another because they had the same origin but through evolution, have been modified. 3. Circle the correct answer: ½ off for each incorrect answer a. Crayfish have direct / indirect development. b. Crabs have direct / indirect development. 4. (3 points) Name the crustacean appendage and briefly describe its function: ½ off for each incorrect answer NAME FUNCTION a. Antennule Touch, taste, equilibrium
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Unformatted text preview: b. Cheliped Grasping food, offense, defense c. Third swimmeret Creating water currents (and in females carrying eggs and young) 5. Circle the correct answer: off for each incorrect answer a. Crustaceans have uniramous / biramous appendages. b. Uniramians have uniramous / biramous appendages. 6. What distinguishes animals in the class Chilopoda from those in class Diplopoda? Chilopoda have fewer legs because Diplopodans have 4 legs (2 pairs) per segment while Chilopodans have 2 legs (1 pair) per segment 7. What is the function of the forewings in the grasshopper? Protection of hindwings (not flight) 8. About ocelli off for each incorrect answer a. What are ocelli? A small simple eye b. Circle the ocelli on the grasshopper head shown to the right....
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Lab_08_Worksheet_Key - b. Cheliped Grasping food, offense,...

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