You are presented with the question "What usually occur in genes that control the cell cycle?" and the following answer choices: 
- Leptospirosis
 - competition
 - A Greek letter
 - a mutation in cells
 - Plant reproduction
 - biological diversity
 - resistance
 - resistance activities

Now knowing that mutations that lead to cancer usually occur in genes that control the cell cycle and cancer is an example of a mutation in cells, choose the best answer.


 

    a mutation in cells     