Biology, 14.09.2019 05:30 BigDaddy1220
Why was the evolution of the extraembryonic membranes crucial for colonization of land by the vertebrates? extraembryonic membranes
a. provide nutrients that produce energy for development
b. direct morphogenesis within the embryo
c. give rise to crucial organ systems, like the heart and brain
d. provide an aqueous environment for embryo development
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