Question

A student wants to test the impact of X-ray radiation on tomato plant growth. Which of the following guidelines should be followed when designing the control group?

a. Use a group of tomato plants exposed to X-ray radiation
b. Include a group of tomato plants without any X-ray exposure
c. Expose all tomato plants to varying levels of X-ray radiation
d. Include a group of tomato plants with different types of radiation exposure

Answer 1

The control group in an experiment testing the impact of X-ray radiation on tomato plant growth should consist of tomato plants that are not exposed to any X-ray radiation to serve as a baseline for comparison.

Step-by-step explanation:

When designing the control group for an experiment to test the impact of X-ray radiation on tomato plant growth, the guidelines should include a group of tomato plants without any X-ray exposure. This provides a baseline against which to compare the plants exposed to X-ray radiation, allowing for a clear understanding of how X-ray radiation affects plant growth. It's crucial to minimize variables other than the radiation exposure to maintain the integrity of the experiment.