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Some of the first animals to develop an endoskeleton were _____. mollusks. arthropods. annelids. echinoderms.
Some of the first animals to develop an endoskeleton were: Echinoderms.
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Asked 4/21/2012 10:34:38 AM
Updated 8/6/2018 10:36:26 AM
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Flagged by andronep [8/6/2018 5:31:14 AM], Unflagged by jeifunk [8/6/2018 10:36:25 AM], Edited by jeifunk [8/6/2018 10:36:26 AM]
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Some of the first animals to develop an endoskeleton were: Echinoderms.
Added 8/6/2018 5:31:16 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [8/6/2018 10:36:30 AM], Rated good by jeifunk
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