A gardener is investigating whether Brand X fertilizer will increase the growth rate of the rose plants growing in an outdoor garden. Which rose plant would be the control for this investigation?
A. a rose plant in the garden given only water and sunlight
B. a rose plant in the garden given Brand X fertilizer, water, and sunlight
C. a rose plant in a container given Brand X fertilizer and placed inside a greenhouse
D. a rose plant in a container given only water and sunlight and placed inside a greenhouse
1 answer
A control group is a group which does not receive the treatment which in this case is the fertilizer. So A would be the best choice
1 answer