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Phototrophs are organisms that obtain energy from light to carry out cellular processes. They use photosynthesis to convert light energy into chemical energy.
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Chemotrophs: Organisms that obtain energy by oxidizing inorganic or organic chemicals.
Photosynthesis: The process used by phototrophs to convert light energy into chemical energy stored in glucose.
Chlorophyll: A pigment found in phototrophs that is essential for absorbing light during photosynthesis.