Question

scientists must design a controlled experiment to determine the effect fertilizers have on cyanobacteria growth. select the statement(s) that accurately describes the dependent variable in the controlled experiment. in this study, the dependent variable is the type of fertilizer used. in this study, the dependent variable is the growth of the cyanobacteria. the factors that are kept constant. the factor that will change in response to the test variable. the factor that is measured or observed.

Explanation:

In an experiment, the dependent variable is what is being measured or observed and changes in response to the independent variable (the test variable, which here is the type of fertilizer). The growth of cyanobacteria fits this definition as it is expected to change based on the fertilizer used and is the factor being measured.

Answer:

B. In this study, the dependent variable is the growth of the cyanobacteria.
D. The factor that will change in response to the test variable.
E. The factor that is measured or observed.