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Blume ch 12.3

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