Theodor W. Engelmann illuminated a filament of algae with light that passed through a prism, thus exposing different segments of algae to different wavelengths of light. He added aerobic bacteria and then noted in which areas the bacteria congregated. He noted that the largest groups were found in the areas illuminated by the red and blue light. Which of the following statements describes a relationship that Engelmann's experiment helped to determine?A. amount of carbon dioxide and the rate of photosynthesis B. wavelengths of light and the rate of aerobic respiration C. wavelengths of light and the rate of photosynthesis D. amount of carbon dioxide and the rate of anaerobic respiration

C. wavelengths of light and the rate of photosynthesis

Explanation:

The experiment by Theodor W. Engelman demonstrated the relationship between wavelengths of light and the rate of photosynthesis.

Various experiments have reported that the optimal regions of white light that drive photosynthesis is the red and blue regions.

During photosynthesis, carbon dioxide and water is utilized to synthesize glucose and oxygen is produced as a result. Hence, the rate of production of oxygen is directly proportional to the rate of photosynthesis.

Therefore, the more the photosynthesis rate, the more the oxygen produced and the more the growth of aerobic bacteria. This is why more bacterial growth was observed around the red and blue region of white light according to Engelmann's observation.

The correct option is C.

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