All of the interconnected and overlapping food chains in an ecosystem make up a food web. Organisms in food chains are grouped into categories called trophic levels. ... Nearly all autotrophs use a process called photosynthesis to create “food” (a nutrient called glucose) from sunlight, carbon dioxide, and water.
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All of the interconnected and overlapping food chains in an ecosystem make up a food web. Organisms in food chains are grouped into categories called trophic levels. ... Nearly all autotrophs use a process called photosynthesis to create “food” (a nutrient called glucose) from sunlight, carbon dioxide, and water.
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