A student wanted to determine what concentration low, medium, or high of a chemical released from brown algae prevented coral larvae from settling and growing on the algae. Each concentration level of the chemical from one brown alga was added to the water Percent of Larvae Settled of each tank. Tank size, water temperature, and algae species were held constant. A different number and species of larvae were dropped into each tank. After three days, the percent of settled larvae for each concentration of inhibiting chemical was found.
1. Evaluate What are the design flaws in this experiment?How would you change the experiment to make the results more valid?
2. Analyze The student concluded that at all levels the inhibiting chemical affected the rate of settlement of marine larvae. Is this an accurate conclusion based on the data collected? Explain.