Which of these is best studied using radio waves instead of light waves? a. the sun c. a nebula made of gas and dust red giant star d. a large galaxy made of billions of stars

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

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.

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems