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

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On test plz hurry, answer only if you know

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures

On a spring day, a middle-latitude city (about 40? north latitude) has a surface (sea-level) temperature of 10 ? c. if vertical soundings reveal a nearly constant environmental lapse rate of 6.5 ? c per kilometer and a temperature at the tropopause of –55 ? c, what is the height of the tropopause?

Acodon consists of bases and specifies which will be inserted into the polypeptide chain.