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A scientist wants to determine which fertilizer is more effective—Fertilizer X or Fertilizer Y. The best way for her to proceed would be to design an experiment with


A.two groups of plants—a group fertilized by Y and a control group with no fertilizer.


B.two groups of plants—a group fertilized by X and a control group with no fertilizer.


C.three groups of plants—a group fertilized by X, a group fertilized by both X and Y, and a control group with no fertilizer.


D.three groups of plants—a group fertilized by X, a group fertilized by Y, and a control group with no fertilizer.

Verified Answer :

baileylynn3

D, because that way you'd have an original to compare both to, and you have both the X and Y fertilizers to compare too.

MelaF

Answer:

D.three groups of plants—a group fertilized by X, a group fertilized by Y, and a control group with no fertilizer.

Explanation:

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