1. Introduction to Biology
Experimental Design
Multiple Choice
Multiple ChoiceA scientist wants to study the effects of nitrogen on wheat plants. They set up an experiment with 4 groups of plants: group A gets 20 pounds of nitrogen per acre, group B gets 40 pounds per acre, group C gets 60 pounds per acre, and group D gets 0 pounds per acre. Which of the following is the control group? Is it a positive or negative control group?
A
Group A.
B
Group B.
C
Group C.
D
Group D.
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