Final answer:
The active cell signaling pathway is necessary for triggering events related to cell division. Growth factors bind to cell-surface receptors called receptor tyrosine kinases (RTKs), which initiate a signaling pathway involving the enzyme MAP kinase, stimulating the expression of proteins that initiate cell division.
Step-by-step explanation:
The active cell signaling pathway is necessary for triggering the events related to cell division. Cells do not normally divide unless they are stimulated by signals from other cells. These signals, known as growth factors, bind to cell-surface receptors called receptor tyrosine kinases (RTKs), which initiate a signaling pathway involving the enzyme MAP kinase. This pathway stimulates the expression of proteins that interact with cellular components to initiate cell division.