A rock layer's __ are is its age compared to the ages of other rock layers.

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content

Aresearcher created three groups based on participants bmi: normal weight, overweight and obese. the hypothesis being tested is that the three groups differ in the mean number of artificially sweetened drinks consumed weekly. which statistical test might the researcher use, assuming a reasonably normal distribution of values.

Which system sends messages to organs and tissues?