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发表于 2023-3-16 11:47:51
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• Earlist veterbrates
○ Closest living relatives: Protochordates( Tunicate & lancele)
○ Similar: lancelet amphioxus
○ Advancements:
§ sense organs & large brain& muscle blocks
§ Metabolic capability: circulatory, respiratory, digestive system
§ Kidney & endocrine system& tissue-bone
○ Explanation: natural selection
§ Questions: what enviroment * what the selective forces are
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