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

[EX Q]: The combined gas law involves three properties of a gas - volume, absolute temperature, and what?
[EX A]: pressure

[EX Q]: Where are free-living roundworms mainly found?
[EX A]: freshwater habitats

[EX Q]: The most powerful or influential individual in a group is sometimes called what?
[EX A]:
dominant