4. Phil is conducting a seed germination experiment. He places 3 groups of lettu

Question

4. Phil is conducting a seed germination experiment. He places 3 groups of lettuce seeds in a 34º Celsius
incubator with adequate moisture. One set of seeds is placed in a dark area with no light source. A second set
is placed under artificial light and third set of seeds is placed in direct sunlight. This experiment is intended to
test Phil's hypothesis that light is necessary for lettuce seed germination.
Based on the experimental design, which group was the control?
A. Moisture
B. Seeds in the dark
C. Type of light
D. Temperature
E. Germination rate

Explanation / Answer

In this study seeds in the dark is control group. The control group does not receive any treatment by the researchers in an experiment and this control group is used for the comparison with other test group. In this experiment seeds in the dark is not receiving any treatment as it is placed in a dark area with no light source. Hence seeds in the dark is control group in this experiment.

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