Biology, 30.08.2019 02:30 gabbys2002

Agricultural scientists are trying a new man-made vitamin on tomato plants to make them bigger and redder. they are putting the vitamin in the soil of a group of plants, and are also observing a group of plants that have received nothing other than regular water. this second group is the:
variable group.
experimental group.
placebo group.
control group

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Agricultural scientists are trying a new man-made vitamin on tomato plants to make them bigger and r...