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Edexcel A level Biology : topic 1- 4
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Question:
Daphnia experiment
Author: seremi amuneAnswer:
Measures the effect of caffeine on heart rate daphnia placed under microscope in pro-slow solution 5 different concentrations of caffeine used allow daphnia to acclimatise for about 2 mins before carrying out experiment count how many heart beats using a clicker for 1 min do repeats to get the mean heart rate make sure all daphnia used are the same age and same source
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seremi amune