Question

a researcher studied two groups of fruit flies. population a was kept in a 0.5 l container. population b was kept in a 1 l container. in other respects, both groups were treated similarly. the graph shows the changes to both populations over time. what is the dependent variable? a. time in days b. number of flies (population) c. size of the containers d. none of the above

Explanation:

In an experiment, the dependent variable is what is being measured and changes in response to the independent variable. Here, the researcher is observing how the fruit - fly population changes over time and with different container sizes. The number of flies is what is being measured, so it is the dependent variable.

Answer:

B. Number of flies (population)