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24 Cards in this Set
- Front
- Back
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How do most worms move?
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They wriggle their bodies from side to side.
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Where do feather-duster worms live?
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In stony tubes which offer protection from animals.
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How do feather-duster worms get food and oxygen?
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Their feather like structures are thrust out of the tube to get oxygen and plankton.
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There are enough differences between groups of worms to justify what?
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That they are placed in different phylums.
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What is the water column?
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The vertical zone of water that extends from the top of the ocean to its bottom.
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Where in the water column can worms be found?
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There are very few places that they are not found.
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What phylum are flatworms in?
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Platyhelminthes
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What is the distinguishing trait putting flatworms in the platyhelminthes phylum?
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Their flat-body shape
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How many species of flatworms are there?
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more than 10,000.
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What are three types of flatworms?
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Planaria, Tapeworm, Liver Fluke
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What do Planarians feed on?
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Small organisms and organic debris.
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Where are Planarians found?
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Around freshwater and marine habitats.
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Where is a planarians mouth?
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On their lower or ventral surface.
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what is different about planarians from other worms?
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They have a two-way digestive tract.
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What are planarians?
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Type of flatworms found in freshwater, has eyespots, ganglia and bilateral symmetry.
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What is ganglia?
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nerve cell clusters that act like a simple brain, found in flatworms.
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What is bilateral symmetry?
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Body plan in which structures on the left side of the bodya re the same as on the right.
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Like most flatworms a planarian is a...?
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Hermaphrodite, contains male and female reproduction organisms.
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What happens during mating?
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Two flatworms exchange sperm and it is fertilized by the other flatworm internally.
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What are planaria characterized by?
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Beautiful colors and patterns, and frilly edges.
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What is a parasite?
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An organism that obtains its food by living in or on the body of another organism.
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What is a host?
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The organism fed on by a parasite.
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A tape worm can be found where?
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In the intestines of fish and other animals including humans.
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Why does a tapeworm not need a digestive system?
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It attaches itself to intestinal lining of an organism and absorbs nutrients that way.
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