Cancer cells are * 1)mutated cells inherited from a parent
2)mutated cells that occur by chance
3)cells that divide more than 30 rounds of cell division
4)all of the above

Thank you boys and girls.

i think all of the above rught or weong tell ok

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.

the sphincter muscles at the end of the digestive tract is the anus.