This assignment requires you to evaluate a hypothesis and communicate the results of your leaf pack study. The questions below are meant to guide you to reporting the key findings of your experiment and help you think through how to explain the findings and draw conclusions from them in a scientific manner.
ASSIGNMENT: Please respond to the following questions to complete your laboratory write up. For this assignment you will only focus on the numbers of different macroinvertebrates in the different leaf packs.
1. What did you think was going to happen in this experiment and why? You may find it helpful to state your answers to these questions as an “if-then” hypothesis-prediction. Be sure you have included a biological rationale that explains WHY you made this hypothesis/prediction. Think about the connections between the different types of environments and the types of macroinvertebrates that are found in those environments.
2. How did the different leaf pack locations influence the invertebrates found in the packs? Answer this question by creating a bar graph that shows the results of your experiment. If you need assistance building a graph, there is a Guide to Graphing resource available on your Moodle lab course site.
3. Explain why you think that the results shown in your graph support or refute your hypothesis (remember we never “prove” anything in science). Consider all your data and the overall data pattern as you answer this question. Don’t ignore unusual data that may not seem to fit into a specific patterns (“outliers”). Explain what you think might be behind these unusual data points.
4. What is the biological significance of your results? What biological concepts explain completely why these events happened in the experiment? You might consider abiotic factors like temperature or water movement or biotic factors like competition or predation. Think about giving a specific example.
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