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:
I believe the answer is the second one.
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I say it is all of the above.
its a little too confusing for me
Hitherei thinkthe answeris1
An -NH2 group is an AMINO group.......
