Although all of the cells of a human develop from one fertilized egg, the human is born with many
different types of cells. Which statement best explains this observation?
a. Developing cells may express different parts of their identical genetic instructions.
b. Mutations occur during development as a result of envirnmental conditions.
C. All cells have different genetic material.
d. Some cells develop before other cells.
Answers: 2
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Although all of the cells of a human develop from one fertilized egg, the human is born with many
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