Are there any environmental or pathogenic factors that can cause cancer

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

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.

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.