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.

[EX Q]: Question: Which law means that the simplest of competing theories is most likely to be correct? Answer: law of parsimony
[EX A]: 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.

[EX Q]: Question: What remains a constant of radioactive substance over time? Answer: rate of decay
[EX A]: The rate of decay of a radioactive substance is constant over time.

[EX Q]: Question: Which plant group has vascular tissue, seeds, and flowers? Answer: angiosperms
[EX A]:
Angiosperms have vascular tissue, seeds, and flowers.