Explain what the term half-life means and how knowing the half-life of an element can a geologist establish the age of a rock or fossil.

What are the two main phases of a cell cycle

Which would be the most useful source of evidence to support mcneill's contention?

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.