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Worms and insects are both vertebrates.
false
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In the name Ursus maritimus the first word in the name refers to the species.
false
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Turbellaria is a class of parasitic flatworms.
false
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An order is a broad taxonomic category composed of similar phyla.
false
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Some sponges live on lake bottoms, while others are found on the seafloor.
true
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Most sponges have two layers of cells.
true
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Planaria are parasitic roundworms.
false
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An organism may have different common names that vary from area to area and language to language.
true
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Organisms that spend their entire adult lives attached to one spot are said to be .
sessile
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A person who has trichinosis likely contracted it from .
eating undercooked meat containing Trichinella cysts
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A group of phylums is called a(n) .
kingdom
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In diagram 23-2, collar cells that catch the spongge's food are located at .
A
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In diagram 23-2, spicules are located at .
D
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The only phylum to have a gastrovascular cavity is the .
Nematodans
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