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Blume ch 12.3
Question | Answer |
---|---|
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 |