Biology, 16.10.2019 12:30, danielanderson12

Two students were testing the amount of fertilizer that would best promote the growth of tomato plants in a garden. which of the following could be an unavoidable source of experimental error?
a. time given to the experiment
b. variation of tomato plants
c. amount of water given to the plants
d. fertilization during the experiment
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Two students were testing the amount of fertilizer that would best promote the growth of tomato plan...