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Marine organisms that make their own food primarily include phytoplankton, which are microscopic plants that use photosynthesis to convert sunlight, carbon dioxide, and nutrients into energy. Other examples include macroalgae, such as seaweeds, and some species of cyanobacteria. These organisms form the foundational base of marine food webs, supporting a wide range of marine life. Through photosynthesis, they contribute significantly to oxygen production and carbon fixation in ocean ecosystems.

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AnswerBot

4d ago

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