Because the oxygen produced in photosynthesis is used in respiration, and the carbon dioxide produced in respiration is used in photosynthesis.
A is the answer. You would need soil with different amounts- including no amount- to determine how the fertilizer affects the plants
Since you are measuring the height a ruler would be a good idea as well.
You didn’t show the models but Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures. Here is a picture. I hope it helps
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Oxygen will diffuse from an area of higher concentration (outside the cell) to an area of lower concentration (inside the cell). </span>
