The answer should be surface.
Answer:
Cyclin-regulates the timing of the cell cycle. Normally, when cells touch, they stop growing. Growth factors-one of a group of external regulatory proteins that stimulate the growth and division of cells.
Explanation:
I hope it's help u
Answer:
DNA needs RNA to be copied.
Explanation:
The transcription process starts by DNA "Unziping" itself and the RNA polymerase matches up to its allele. This then copies the DNA and it is sent out to a ribosome for the translation process.
I think it's 3 because you need oxygen in your body to survive