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Adam Lipnicki
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 |
What are usually parasites, and few are free-living? | flatworms |
What are free-living flatworms that feed on small organisms or dead bodies of larger organisms? | planarians |
What are the three places where most planarians live? | under rocks, on plant material, or in fresh water |
How do planarians reproduce, and how do they have their babies (Ex: Laying eggs or birth)? | they can reproduce asexually or sexually, and they lay eggs |
What are parasites that live in the intestines of a host animal? | flukes |
How do most flukes reproduces? | sexually |
Flukes cause what blood disease that is potentially fatal in humans? | schstosamiasts |
What are parasites that live in the intestines of a host animal? | tapeworms |
Who do tapeworms absorb digested food from? | host cell |
What do tapeworms produce that contain sperm and eggs? | body segments |
The fertilized eggs from tapeworms pass out of the host's body and can do what to another host? | enter it |
What were believed to probably be the first animals to have bilateral symmetry, senses and nerves in the head region, and a third tissue layer that develops into organs and systems? | flatworms |
What are also called nematodes, are extremely abundant, live in a variety of environments, and have two body openings-a mouth and an anus? | roundworms |
What worm appeared early in "animal evolution", but scientists are not sure how they "evolved"? | roundworms |
Many roundworms are plant and animal; what disease can they cause in humans? | trichinosis |
Roundworms can be beneficial because they kill what? | pests |
Roundworms are essential because they can develop healthy what? | soil |