•If
increased concentrations of caffeine increase heart rate in the model organism,
“Daphnia magna”, then consumption of caffeine is directly
proportional to increased heart rate in humans (increase in amount of caffeine will lid to higher heart rate).
•Prediction:
Increased concentrations of caffeine will increase heart rate.
•Independent:
concentrations of caffeine
•Dependent:
heart rate
•Control:
no caffeine (water)
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