Why was the evolution of the extraembryonic membranes crucial for colonisation of land by the vertebrates? Extraembryonic membranes ________.
A) provide an aqueous environment for embryo development
B) provide nutrients that produce energy for development
C) direct morphogenesis within the embryo
D) give rise to crucial organ systems, like the heart and brain

Question

Quizplus · Accepted Answer

Extraembryonic membranes provide a protective aqueous environment for the embryo to develop outside of the aquatic environment. This adaptation was crucial for vertebrates to colonize land.

Why Was the Evolution of the Extraembryonic Membranes Crucial for Colonisation