Knownothing
Knownothing
08.04.2020 • 
Biology

To test the effectiveness of plant fertilizer, groups of plants are grown with different types of fertilizer. A control group of
plants would
A not be given any fertilizer.
B
be grown with a mixture of all the fertilizers.
C
not be needed unless the results were unclear.
D
be grown in a different location from the other groups.

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