instruction:
Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.
question:
Question: What branch of science is based on the modern atomic theory, which states that all matter is composed of atoms? Answer: chemistry
answer:
Chemistry is based on the modern atomic theory, which states that all matter is composed of atoms.

question:
Question: Which law means that the simplest of competing theories is most likely to be correct? Answer: law of parsimony
answer:
The formation of scientific theories is generally guided by the law of parsimony. According to this law, the simplest of competing theories is most likely to be correct.

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Question: What is the body of a roundworm covered with? Answer: tough cuticle
answer:
Roundworms have a pseudocoelom and hydrostatic skeleton. Their body is covered with tough cuticle.