Name: IB BIOLOGY Diagnostic Test 1. A psychology teacher allowed his third period class to eat snacks while taking an exam. His fourth period class was not allowed to eat snacks while taking the same exam. He compared the test averages from both classes. Prior to this, both classes averaged comparable exam scores. a. What is the hypothesis? b. What is the control group? c. What is the experimental group? d. What is the independent variable? e. What is the dependent variable? 2. A group of scientists are testing the hypothesis that people learn more when they study in a quiet versus a noisy place. a. How many trials should be conducted at minimum? b. How many people should be tested? c. List variables that should be controlled if possible. d. What sources of error could be present in this study? 3. List the steps of the scientific method in the order that they should be followed. 4. Define the following. a. Hypothesis b. Law c. Prediction d. Theory 5. Define these types of data. a. Quantitative b. Qualitative 6. For each instance, state what lab equipment a scientist would use to measure each quantity. a. Liquid fertilizer to add to a flower pot b. The width of a desk 7. A scientist is studying how the concentration of salt in water will affect the height of Vigna radiata plants. His results are in the table below. Graph the results. Salt Concentration 0% 1% 4% 3% 2% Height 9 10 5 4 7 8. Suzy makes 2 liters of salt water to add to her salt water aquarium. Identify the solution, the solute, and the solvent. 9. Write the molecular formula and the structural formula for water. 10. Draw a picture of a eukaryotic plant cell. Label all the organelles. 11. State the components of cell theory. 12. List the stages of mitosis in chronological order. 13. List the nitrogenous bases found in DNA and RNA. 14. List the four organic macromolecules and their micro components.