1. A researcher is investigating the effect of different types of soil on the growth of a plant species. They plant the same number of seedlings in four different soil types and measure the height of the plants after a fixed time. Which of the following is the best way to analyze the data and determine the effect of soil type on plant growth?

2. A scientist is studying the effects of temperature on the rate of a chemical reaction. They set up four experiments, each with the same starting materials and reaction conditions, but with different temperatures. After a fixed time, they measure the amount of product formed in each experiment. Which of the following is the best way to analyze the data and determine the effect of temperature on the reaction rate?

3. A scientist is investigating the effect of temperature on the rate of a chemical reaction. They set up an experiment with 5 reaction vessels, each maintained at a different temperature (10°C, 20°C, 30°C, 40°C, and 50°C). They measure the rate of the reaction in each vessel and record the data. Which of the following is the best way for the scientist to analyze the data and determine the relationship between temperature and reaction rate?

4. A researcher is studying the effects of a new drug on the growth of bacteria. They inoculate 4 petri dishes with the same strain of bacteria and expose them to different concentrations of the drug. After 24 hours, they measure the diameter of the bacterial colonies in each dish. Which of the following is the best way to analyze the data and determine the effect of the drug concentration on bacterial growth?

5. A scientist is studying the effects of a new drug on the growth of bacteria. They inoculate 4 petri dishes with the same strain of bacteria and expose them to different concentrations of the drug. After 24 hours, they measure the diameter of the bacterial colonies in each dish. Which of the following is the best way for the scientist to analyze the data and determine the effect of the drug concentration on bacterial growth?

6. A researcher is studying the effects of a new drug on the growth of bacteria. They inoculate 10 petri dishes with the same strain of bacteria and expose them to different concentrations of the drug. After 24 hours, they measure the diameter of the bacterial colonies in each dish. The researcher wants to determine if there is a statistically significant difference in the diameter of the bacterial colonies between the different drug concentrations. Which statistical test would be most appropriate for the researcher to use?

7. A researcher is investigating the effect of light intensity on the rate of photosynthesis in a plant. They set up four experiments, each with the same plant species and growth conditions, but with different light intensities: 100 lux, 500 lux, 1000 lux, and 2000 lux. They measure the rate of oxygen production in each experiment as an indicator of the rate of photosynthesis. Which of the following graphs would best represent the relationship between light intensity and the rate of photosynthesis?

8. A biologist is studying the effect of different nutrient concentrations on the growth of a plant species. They plant the same number of seedlings in four different nutrient solutions and measure the height of the plants after a fixed time. Which of the following is the best way to analyze the data and determine the effect of nutrient concentration on plant growth?

9. A researcher is studying the effects of a new drug on the growth of cancer cells in a petri dish. They expose the cancer cells to different concentrations of the drug and measure the percentage of cells that survive after 48 hours. The researcher wants to determine the half-maximal effective concentration (EC50) of the drug, which is the concentration at which 50% of the cells are killed. Which of the following methods would be most appropriate for the researcher to use to calculate the EC50?

10. A scientist is studying the effect of pH on the activity of an enzyme. They set up five test tubes, each containing the same amount of enzyme and substrate, but with different pH levels. After a fixed time, they measure the amount of product formed in each test tube. Which of the following is the best way to analyze the data and determine the effect of pH on enzyme activity?