WestHeadHITTA
WestHeadHITTA WestHeadHITTA
  • 21-05-2019
  • Biology
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Smartiesszz
Smartiesszz Smartiesszz
  • 21-05-2019

Answer:

pharyngeal gill slits: feature that arose in reptiles and helped vertebrates to colonize land

notochord: flexible structure that supports the nerve cord and led to the evolution of the backbone

endoskeleton: internal support system that allowed for large, heavy bodies.

amniotic egg: structure that develops within the mesoderm and allowed for more complex internal organ formation.

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