Author: Anonymous

A study looked at whether higher chocolate consumption predicts higher body mass in humans.  They fitted the data using a linear regression having chocolate consumption (number of times consumed per week) as the explanatory variable and the body mass index (BMI) as the response variable.  The slope of the regression line was -0.092, with a standard error of 0.025 and p-value of 0.009.  What conclusion would you draw from these results?

Where does the electron transport chain occur in bacteria?

Use the study data outlined below to answer the next 5 questions. A study of people with and without multiple sclerosis (MS) was used to test the idea that the disease is caused by blood flow restriction resulting from a vein condition known as chronic cerebrospinal venous insufficiency (CCSVI).  Of 39 randomly sampled patients with MS, 25 were found to have CCSVI and 14 were not.  Of 26 healthy control subjects, 14 were found to have CCSVI and 12 were not.

Provide a definition of an imperfect and an incomplete flower. (0.5pts each)

Question 4 Use the appropriate test to calculate the test statistic (Formula page provided at the start of the Experimental Biology & Biostatistics exam module)

Question 1 What is the explanatory variable?

Why might increased soil fertility result in lower species diversity?

Alleopathy and facilitation are two non-competition processes that shape plant communities. Describe each of these processes (0.5pts) and give an example of each (0.5pts).

Which of the following is a major category of secondary chemicals in plants?

What is the latitudinal richness gradient? (0.5pts) Give two hypotheses that may explain the processes behind this pattern (0.5pts each; 1pt total).