What does relative age mean

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Suppose you were the commissioner of corrections for your state. which correctional activities might come within your domain? which mostly would not

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)