Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: In science, something that always applies under the same conditions is called a scientific law.

Answer: In science, what do you call something that always applies under the same conditions?


Question: Protons and neutrons are made of quarks, which are fundamental particles of matter.

Answer: A fundamental particle of matter, protons and neutrons are made of these?


Question: A capsule is the name of the extra layer that prokaryotes have outside the cell wall.

Answer:
What is the name of the extra layer that prokaryotes have outside the cell wall?