1. Daphnia
... ). Daphnia are also ectothermic, or cold-blooded. They do not draw heat from their own metabolism, which is called homeothermic. Instead they must get it from an outside source. They regulate their body temperature by soaking up heat from the environment around it (Campbell et al, 2003). In this experiment there ... are many reasons why the Daphnia is used. One reason is that they are very responsive to the variations in water. Daphnia are also very cheap to raise outside of their natural environment. Another ... will decrease the heart rate of the Daphnia Adding epinephrine to the wate...
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- Grade Level: High School