nickymarie
nickymarie nickymarie
  • 23-10-2020
  • Biology
contestada

describe the two types of external growth factors

Respuesta :

ani823
ani823 ani823
  • 23-10-2020

Answer:

Chemical and physical signals

Explanation:

Growth factors - proteins that stimulate cell division

(Most mammal cells form a single layer in a petri dish and stop dividing when they touch other cells.)

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