Answer:
I think she should try the experiment one set with fertilizer, and one without. The negative control group would be the set of rose bushes grown without the fertilizer, but under the exact same conditions as the experimental group. Then, if a difference is seen you can be sure it's accurate, since you tested with and without fertilizer under the same conditions. Sorry if i am wrong, I am not completly sure about this one. Again I might be wrong so sorry in advance.
Answer:The anesthesia has blocked the Inter-neurons from carrying signals to the brain.
<span>For each count, only one digit changes.</span>
Answer:
hypothesis
Explanation:
the reason you do the experiment is to test the hypothesis
<span>B. They exist only in the northern hemisphere</span>