Many specialized cells, such as white blood cells, ____
a. remain in G0 until stimulated by external signals to reenter the cell cycle and divide
b. remain in S until hormonal signals cause the cell to reenter the cell cycle and divide
c. divide continuously and never transition to G0
d. mutate into other cell types by signals from bone marrow cells
e. skip anaphase in order to avoid the high likelihood of mutation during this phase of mitosis
a
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