Related Clues:

• Change from time to time
• Don't stay the same
• Exhibit Darwinism
• Word in mileage disclaimers
• Diversify, as a diet
• Change with time
• Change gradually
• Increase in complexity, perhaps
• Develop by gradual changes
• "Prices may ___"
• Results may do this, in commercials
• Disprove creationism, in a way
• Gradually change
• Make or become different
• Change, diverge, deviate