Biology, 22.10.2020 19:01 jiedwards3835
Sarah performs an experiment to determine the effect of nitrogen on plants. She studies the effect of nitrogen on the growth of the root hair, height of the plants, and nodule formation. Which factor is an independent variable?
A.
amount of nitrogen
B.
growth of root hair
C.
nodule formation
D.
height of the plants
Answers: 1
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Sarah performs an experiment to determine the effect of nitrogen on plants. She studies the effect o...
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