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valentinak56 [21]

2 years ago

5

A student wants to test the effect of nitrogen rich fertilizers on the growth of rose bushes. Which of the following is a variab

le that must be kept constant?
Growth of the rose bush
Amount of water the rose bush receives
The use of nitrogen rich fertilizer

1 answer:

Alchen [17]2 years ago

7 0

I believe the answer is the second one.

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