In a fertile chicken egg shortly after laying, the developing embryo is present as the:
Correct answer: A. Blastoderm
- A. Blastoderm
- B. Chalaza
- C. Amnion
- D. Yolk sac
Explanation
The blastoderm is the multilayered disc of embryonic cells formed after cleavage of the fertilized ovum. The chalaza suspends the yolk, while the amnion and yolk sac develop later as extraembryonic membranes.
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