Cold-Vertebrates
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 are 4 characteristics that are present at some stage of development? | notochords, postanal tails, nerve cord,& gillslits
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what is the notochord? | firm flexible structure
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What does the notochord replace in many animals? | backbone
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what is the postanal tail? | muscular structure
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what animals do not lose the notochords? | tunicates, lancelates
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what is the nerve cord? | tube like structure
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What does the nerve cord change into in most fish? | spinal cord & brain
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What are gillslits? | pairs of openings
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what do they change into on fish? | gills
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what is an endoskeleton? | internal skeleton
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what is the endoskeleton made of? | bone or cartilage
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what is the function of the endo skeleton? | attach to skeleton,support,& protect
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what are vertebrae? | bone that make up the backbone
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