Use the scenario to answer the question.
You investigate the effect of different concentrations of ethylene spray on ripening in bananas.
What would be the independent variable of this investigation?
(1 point)
Responses
the age of the bananas
the age of the bananas
the length of ripening time
the length of ripening time
the color of the bananas
the color of the bananas
the concentrations of ethylene spray
the concentrations of ethylene spray
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