Textbook Question
Galpayage and co-workers disinfected the wooden balls after each experiment. If they had not included this step, how might this have impacted their interpretation of the data?
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1. Introduction to Biology
Experimental Design
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In an experiment testing the effect of a new fertilizer on plant growth, which of the following would be considered the control group?
A
Plants receiving no fertilizer
B
Plants receiving the new fertilizer
C
Plants receiving double the amount of the new fertilizer
D
Plants receiving a different type of fertilizer
Verified step by step guidance1
Understand the purpose of a control group in an experiment: A control group is used as a baseline to compare the effects of the experimental treatment. It does not receive the experimental treatment, allowing researchers to see what changes occur due to the treatment itself.
Identify the experimental treatment in the problem: The experimental treatment in this scenario is the new fertilizer being tested for its effect on plant growth.
Determine which group does not receive the experimental treatment: The control group should not receive the new fertilizer, as it serves as a baseline for comparison.
Analyze the options provided: Look for the option that describes plants not receiving the new fertilizer. This group will serve as the control group.
Conclude which option represents the control group: The option 'Plants receiving no fertilizer' is the control group, as it provides a baseline to compare the effects of the new fertilizer on plant growth.
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