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Blume ch 12.3

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Question
Answer
What are invertebrates with soft bodies, bilateral symmetry, and three tissue layers organized into organs and organ systems   Worms  
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Flat worms are usually parasites, but a few are___________.   Free-living organisms  
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What are free-living flatworms that feed on small organisms or dead bodies of larger organisms.   Planarians  
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Most planarians live under rocks, on_____ material, or in_________water.   Plant, Water  
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How do planarians reproduce?   Sexually or Asexually; they lay eggs  
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What are parasites with a complex life cycle that requires more than 1 host.   Flukes  
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Flukes produce_________.   Sexually  
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What disease do Flukes cause?   Schistsomiasis  
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What are parasites that liven in the intestines of a host animal?   Tapeworms  
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How do tapeworms get their food?   They absorb the digested food from the host.  
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How do tapeworms reproduce?   They produce body segments that contain sperm and eggs.  
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How do tapeworms get another host?   The can pass out of the host's body and into another host  
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What were the first animals to have bilateral symmetry?   Flatworms  
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_______ and nerves in the head, and a ________ tissue layer that develops into organs and systems.   Senses, Third  
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What are other names for Roundworms?   Nematodes  
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Did roundworms appear early in evolution?   yes  
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Are roundworms parasites?   yes  
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Do roundworms kill pests?   yes  
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Are roundworms essential in good soil?   yes  
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Created by: Cole_Fore
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