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For a lab I must take Volvox protist cells and expose them to specific wavelengths of light. How would I know they're even reacting? The assignment I've been given does not explain what I should even be looking for. I know that they do photosynthesis, so I was thinking of looking for signs of photosynthesis occurring, but I have no idea how to tell if even that is happening.

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    $\begingroup$ What are the inputs and outputs of photosynthesis? How could you detect a change in one of these? How might the appearance of, say, one of the products product appear in the watery environment of Volvox? $\endgroup$ – bpedit Feb 2 '17 at 16:51

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