Question #6422570Single 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 actions would best improve the validity of the experiment?
Options
A
Measuring plant growth every day instead of after 2 weeks
B
Using the same nutrient concentration in all tanks
C
Repeating the experiment multiple times and averaging the results
D
Changing the plant species for each tank to observe different responses
Answer & Analysis
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