question: Write a question you would see in a school textbook.
answer: Why is it important to repeat an experiment several times?

question: Write a question you would see in a school textbook.
answer: Which of the following best describes the purpose of cellular respiration?

question: Write a question you would see in a school textbook.
answer:
In an experiment, a scientist named Pavlov rang a bell before he fed his dogs, which made the dogs drool. Soon the dogs would drool when they heard the bell, even if they did not receive any food. What type of response did the dogs exhibit?