Daphnia Practical Writeup - 820 Words

Daphnia Practical Write-up Purpose and Hypothesis The purpose of this experiment was to determine how affected the heart rate of the daphnia. The results gained from this experiment aids scientific researchers in finding out how caffeine can affect heart rate as well as human health. My hypothesis was that as we increase the caffeine dose the daphnia heartbeat would increase at the same time. Variables The independent variable was the amount of caffeine we administrated to the daphnia. The dependent variable was the heartbeat of the daphnia before and after their caffeine intake. The control variables were the species of daphnia used, the water temperature and the type of microscope used Method Ultimately our method was successful†¦show more content†¦(a)(ii) Works safely with due consideration for the wellbeing of living organisms Seeing as Daphnia are living organisms, it provided equal opportunity to act on these criteria. There were many actions I performed in order to this. I made sure I did not leave the Daphnia underneath the light for too long as it would kill them. I also reintroduced them into their existing environment. This not only took into consideration the wellbeing of the Daphnia but also their environment as well. Also I did not expose to too much caffeine as I did not want their hearts to stop nor did I want to drown them. Also while transporting them to various environments I took a good amount of care and used a pipette to contain them within their own natural