What evolutionary innovation was of key significance in helping tetrapods reduce their dependence on aquatic environments?
A)larger limbs
B)amniotic egg
C)more efficient lungs
D)faster speed
E)teeth to defend themselves

Question

Quizplus · Accepted Answer

The amniotic egg was a key innovation that allowed tetrapods (animals with four limbs) to lay eggs on land, reducing their dependence on aquatic environments. The amniotic egg has a protective membrane that surrounds the embryo and provides it with nutrients and oxygen, allowing it to survive outside of water. This meant that tetrapods no longer needed to return to the water to lay their eggs, and could instead reproduce on land, opening up new habitats for them to explore and inhabit.

What Evolutionary Innovation Was of Key Significance in Helping Tetrapods