Give evidence that suggests that a chorioallantoic placenta was present in the common ancestor of marsupials and placental mammals,but later was lost in most marsupials.

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The Answer of Give evidence that suggests that a chorioallantoic placenta was present in the common ancestor of marsupials and placental mammals,but later was lost in most marsupials.

Give Evidence That Suggests That a Chorioallantoic Placenta Was Present