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Daphnia

Effect of caffeine on Daphnia (Water fleas)

Introduction-

In this study I am going to investigate the effect of caffeine on Daphnia (water fleas) heart rate. I shall use daphnia as they would never have been exposed to caffeine before, unlike a human, who may have already developed a high tolerance to it. Another reason is that Daphnia have a very translucent body; therefore, it is relatively easy to see their heart under a microscope, which makes it easier to count the number of heartbeats, thus, making my results more accurate.

Hypothesis-

Their will be a positive correlation between the concentration of caffeine given to the Daphnia and its heart rate.

My reason behind this hypothesis is based on the fact that caffeine affects the heart rate of humans, as it is a stimulant. From this, I can assume that it also affects the heart rate of Daphnia and that the rise in heart rate should reflect the concentration of caffeine. Many scientific studies within the last......


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Approximate Word Count: 474
Approximate Pages: 2 (250 words per double-spaced page)

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