Blume Ch. 13.2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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What does annelids mean? | "little rings"
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What are setae? | bristle like structures on the outside of each body segment, they help move and "sense" the enviorment
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What type of symmetry do segmented worms have? | bilateral symmetry
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Segmented worms have 2 body openings, what is the posterior opening called | the anus
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Name 2 examples of segmented worms | earthworms, marine worms, and leeches
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What is the crop used for? | It is a sac used for storage
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What muscular structure located behind the crop grinds soil to bits of organic matter | the gizzard
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What are castings? | waste that piles up at the openings of earthworm burrows
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True or false, the earthworm has an open circulatory system | false
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What is the blood vessel on the top of its body called | the dorsal vessel
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What is the blood vessel on the bottom of its body called | the ventral vessel
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Do earthworms have gills or lungs? | Neither. They exchange oxygen and carbon dioxide through their skin
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How do earthworms reproduce? | They are hermaphrodites which means the produce both sperm and eggs but they cannot fertilize themselves
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How many species of marine worms are there? | More than 8,000
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True or false, some marine worms can produce their own light | true
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