Photosynthesis

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“Diagram to show the effect of different portions of the spectrum on photosynthesis. a to F, different regions of the spectrum from red to blue. A filamentous alga lies across these, and bacteria are collecting about the alga, with greatest frequency in the red between B and C, indicating the greatest evolution of oxygen there.” -Stevens, 1916

Source

William Chase Stevens Plant Anatomy (Philadelphia, PA: P. Blakiston, 1916)

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