I
can conclude that if the color of the solution in the control changed, the
control enabled me to have a perspective in which there is no change ought to
have happened. On the off chance that the control arrangement changed its
color, I would conclude that there were life forms in the water.
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D. cellular respiration and photosynthesis
Well there's Water, Earth, Fire, and Air. Not quite sure how this would be a school question. But here it is.
Nitrogen is not a product of photosynthesis