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Section 9.3

Across
Causes cells to behave like cancer cells when it comes to division.
A protein released by certain cells that stimulates other cells to divide.
Where stop and go-ahead signals.
Trigger coordinates of key events in the cell cycle.
Down
To divide, they must be attached to a substratum.
The spread of cancer cells from their original location.
Switches to a nondividing state.
Tumors that can be fatal.
Tumors that are not fatal.