Given a scientific question, generate a correct answer to it.

[Q]: What performance-enhancing drugs are synthetic versions of the male sex hormone, testosterone?
[A]: anabolic steroids

[Q]: What is defined as a repeating series of events that include growth, dna synthesis, and cell division?
[A]: cell cycle

[Q]: The rate of decay of carbon-14 does what over time?
[A]:
remains stable