question: Write a question you would see in a school textbook.
answer: How is the stratosphere different from the troposphere?

question: Write a question you would see in a school textbook.
answer: What is made when sugar is dissolved in water?

question: Write a question you would see in a school textbook.
answer:
A lipid bilayer allows certain molecules to pass through and blocks other molecules. Which structure is most often protected by a lipid bilayer?