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Problem 7 - Entrance Test

Referring to the same algae experiment described in the previous question: | Group | Fertilizer Type | Average Algae Dry Biomass (mg) | |---|---|---| | 1 | Control (None) | 150 | | 2 | Fertilizer X | 280 | | 3 | Fertilizer Y | 210 | | 4 | Fertilizer Z | 320 | What is the dependent variable in this experiment?

Correct: C

The dependent variable is the factor that is measured or observed to change in response to the independent variable. In this experiment, the researchers measured the 'Average Algae Dry Biomass (mg)' to see how it was affected by the different fertilizer types. Fertilizer type is the independent variable, and cultivation duration and initial algae quantity are controlled variables.