Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used. Match each feature to its description. coelom endoskeleton amniotic egg scales notochord pharyngeal gill slits feature that arose in reptiles and helped vertebrates to colonize land arrowBoth structure that develops within the mesoderm and allowed for more complex internal organ formation arrowBoth flexible structure that supports the nerve cord and led to the evolution of the backbone arrowBoth internal support system that allowed for large, heavy bodies arrowBoth