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How does the blastodisc of the fertilized egg differ from an unfertilized one?
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- Why does only one sperm fertilize the egg, and why is this important?What are three notable features between the fertilized and unfertilized egg?What are the archenteron and the blastopore? What is the stage of the embryonic development in which these structures are formed? What are the destinations of the archenteron and of the blastopore?