Random question?

Which of these groups contains single-celled organisms?

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Question generated: Certain fossils can be used to help determine the age of the rock layer in which the fossils are found. Which type of fossil is best to use when making this determination?

Problem: Write a question you would see in a school textbook.

Answer: Which of the following statements best explains why earthquakes occur more frequently in California than in Massachusetts?

question: Write a question you would see in a school textbook. OPTIONS:
- substituting a different coin
- flipping the coin twenty more times
- taping a weight to one side of the coin
- flipping the coin over a smoother surface
answer: A student flips a coin four times. It lands "heads" up three times. The student concludes that the coin will land "heads" up three times out of four. What will make the conclusion more accurate?

An example of a grad-school level question?
The human stomach is protected from self-digestion by a layer of

Random question?
When two objects are touching, heat is transferred from the warmer object to the cooler one by