What is a factor that can stop normal cells from growing?

In terms of cell division, normal cells differ from cancer cells in at least four ways. Normal cells require external growth factors to divide. When synthesis of these growth factors is inhibited by normal cell regulation, the cells stop dividing.

When synthesis from growth factors are inhibited by normal cell regulation, the cells stop dividing.

A) early horses is your answer

Both prokaryotic and eukaryotic cells have ribosomes and cell membranes