Hypothesis …show more content…
Observing Daphnia changing from sexual to asexual reproduction when environmental conditions become critical would be difficult to quantify in a school laboratory; therefore I decided to investigate the effect of temperature on the heart rate of Daphnia, with a view to identifying when critical temperatures were reached. The research question was: What effect does temperature change have on the heart rate of Daphnia? Leading on from this, I hypothesised: From a starting temperature of 0°C, raising the temperature of the water surrounding the Daphnia would increase their heart