TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: The newest, outer layers of secondary xylem are called sapwood.

SOLUTION: What are the newest, outer layers of secondary xylem called?

PROBLEM: By using fructose can you prevent your ice cream from getting a sandy texture.

SOLUTION: How can you prevent your ice cream from getting a sandy texture?

PROBLEM: In the body, oxygen is used by cells of the body's tissues and carbon dioxide is produced as a waste product.

SOLUTION:
In the body, oxygen is used by cells of the body's tissues and carbon dioxide is produced as what?