Your first assignment is to come up with 2 different (unrelated), scientifically

Question

Your first assignment is to come up with 2 different (unrelated), scientifically stated, quantitative hypotheses that are predictive answers to ecologically interesting questions. They must be plausib and logical, precisely stated, and accompanied by a description of an experimental design that answers the "what, where, when, how, and how many/much?" questions in enough detail that another person could set up your experiment and run it. Think of your hypothesis as a predictive statement of quantitative relationship between a cause (Independent, manipulated, controlled, X) variable and an le effect (Dependent, measured, - Y) variable. What effect does varying some environmental factor have on some ecological system (individual, population, community, or ecosystem)? If you're thinking clearly about this, you'll vary X over several levels or amounts (e.g., Zero, Low, Medium, High, ExtraHigh; maybe even Negative), and you will predict (as your Hi) the shape of the response curve in the Y variable. In other words, as X increases, Y will increase/decrease/rise to a plateau/rise to a peak then fall at highest levels... You should be able to visualize a response curve on a bivariate plot-that is the nature of your hypothesized relationship between Independent and Dependent Variables. In your experimental design you must acount for CONTROLS and REPLICATES. Replication means that each treatment level of your Independent Variable has to have multiple runs-to accomplish this, you need to think clearly about what your SAMPLING UNIT is (individual organism? square-meter plot? experimental pond?). Within each replicate for cach treatment level (including Control level) all conditions need to be identical. Format each of your 2 hypotheses like this

Explanation / Answer

Hypothesis 1: There is a dynamic relationship between the bacteria and the host and the changes in major host factors such as salivary flow tilts the balance in plaque community in favor of mutans streptococci and lactobacilli which affect plaque development.

Hypothesis 2: The density of vectors such as mosquitoes depends upon environmental factor such as rainfall and there is a steady increase in vector (mosquito) density with increase in levels of precipitation provided the temperature and humidity remains constant.

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