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Describe the two types of external growth factors
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3 votes
Describe the two types of external growth factors

User Marc DiNino
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1 Answer

3 votes

Answer:

Chemical and physical signals

Step-by-step 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.)

User Pelicer
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