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Adam Lipnicki

Blume Ch 12.3

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
Created by: alipnicki