Name: Matthew K.
Date: March 2004
What part of the egg is the bird? Is it the yellow or
Neither. The zygote, which becomes the embryo, begins development on the
surface of the yolk (yellow), which is the main energy source for the
developing embryo. The albumen (white) provides a protective, cushioned
surrounding for the embryo, and is also used up during development. Some of
the yolk may be retained within the abdomen of the chick when it hatches.
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Update: June 2012