Some metabolically active cells do not proliferate further and ___A____ to enter an inactive stage.

Some metabolically active cells do not proliferate further and A_ to enter an inactive stage.

Step 1: Identify the missing word or phrase in the sentence. In this case, the missing word or phrase is represented by "A_".

Step 2: Analyze the context of the sentence to determine the missing word or phrase. The sentence states that some metabolically active cells do not proliferate further and something happens to them. This something is described as entering an inactive stage.

Step 3: Consider possible options for the missing word or phrase. Based on the context, some possible options for the missing word or phrase could be "cease to divide", "stop dividing", "become dormant", or "enter a quiescent state".

Step 4: Choose the most appropriate option for the missing word or phrase. Considering the context, the most appropriate option for the missing word or phrase is "cease to divide" or "stop dividing". This implies that the cells no longer continue to proliferate and instead enter an inactive stage.

Step 5: Insert the