Which Feature Characterizes the Yolk Sac of Developing Chicks

question 243

Multiple Choice

Which feature characterizes the yolk sac of developing chicks?

• A) It is the last of four extraembryonic membranes to form.
• B) It is tube-shaped at the top and continuous with the gut of the embryo.
• C) Yolk passes through its tube for digestion in the chick's gut.
• D) Ectoderm and mesoderm extend to enclose the yolk.
• E) It is avascular.

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