Which evolutionary innovation was most significant in helping tetrapods move to dry terrestrial environments?

Question

Quizplus · Accepted Answer

The amniotic egg allowed tetrapod embryos to develop in a fluid-filled, protected environment on land, reducing the dependence on water for reproduction. This innovation provided the key adaptation necessary for colonizing dry terrestrial environments. Bone, endothermy, lungs, and limb specialization were also important adaptations for tetrapods, but the amniotic egg was the most significant in enabling their transition to land.

Which Evolutionary Innovation Was Most Significant in Helping Tetrapods Move