Could you tell me which animal phyla evolved limbs first?
回答 (2)
2016-11-06 8:38 pm
Probably the Arthropoda.
2016-11-06 8:38 pm
Probably not.
It would have to be something in the pre-Cambrian, possibly an ancestor to Onychophora or Annelida or Arthropoda.
It would have to be something in the pre-Cambrian, possibly an ancestor to Onychophora or Annelida or Arthropoda.
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