Question #6422566Single Choice
Biology
Question
A researcher is studying the effects of light intensity and nutrient concentration on the growth of a specific type of aquatic plant. She sets up nine tanks, each with varying combinations of light and nutrients:
1. Light Intensity Levels: Low, Medium, High
2. Nutrient Concentration Levels: Low, Medium, High
She measures the plant growth (in cm) in each tank after 2 weeks.
Which of the following describes the type of experimental design used?
Options
A
A single-variable experiment
B
A two-factor controlled experiment
C
A qualitative observational study
D
A randomized survey
Answer & Analysis
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