In the lab on Trophic Interactions you were looking at behavior of mosquito larvae. The question being asked was: Does prey beha
vior change in the presence of a predator? What would be an appropriate null hypothesis for this experiment? Recall in Treatments 2 and 3, a predator was added to the mosquito tanks.
Null hypothesis: the behavior of mosquito larvae doesn't change in the presence/absence of predators added to the tanks in Treatments 2 and 3.
Explanation:
In statistics, the null hypothesis states that there are no differences between the two variables tested in the experiment, while the alternative hypothesis uses the experimental data in order to reject the null hypothesis. In this case, the alternative hypothesis will use the data from treatments 2 and 3 to confirm that predators can modify the behavior of mosquito larvae.
Hormones -- such as melatonin and cortisol; the former signals the body to go to bed, while the latter signals for the sleeping person to wake up -- are created by physiological changes.
