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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
Solution
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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4. Phil is conducting a seed germination experiment. He places 3 gro.pdf

  • 1. 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 Solution 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.