Unit 5 - Principles and Applications of Science II
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Unit 5 - Principles and Applications of Science II
Institution
PEARSON (PEARSON)
Good amount of past exam papers which do appear in majority of the papers. It has helped a lot when i done my exams, by using this i was able to get Distinction. So I’m really sure these past paper question are helpful.
A student investigated the effect of caffeine on the heart rate of the water flea, Daphnia.
Figure 3 shows a Daphnia and the location of its heart.
, The student placed a Daphnia in a Petri dish containing pond water.
The student observed the Daphnia under a light microscope.
The student counted the number of Daphnia heartbeats per minute when the Daphnia was in pond water
containing differing concentrations of caffeine.
The results are shown in Table 2.
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