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What is cell differentiation?
a. An entire organism begins from a _____, a fertilized egg known as a zygote.
b. The zygote divides continuously, by ______ division and forms the ______ made up of several _______ with varying shapes, sizes, and content.
c. Foetal cells are unable to change their structure and function throughout time.
d. An undifferentiated form of a single cell and can grow into fully developed organisms by _______.
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