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Congress
Primary Producers
Organisms, typically plants, algae, and certain bacteria, that produce organic compounds from carbon dioxide and water using sunlight energy through photosynthesis, forming the base of the food chain.
Autotrophs
Organisms that can produce their own food from inorganic substances using light (photosynthesis) or chemical energy (chemosynthesis).
Heterotrophs
Organisms that cannot synthesize their own food and rely on other organisms — either plants or animals — for nutrition.
Nutrient
Substances obtained from food necessary for growth, metabolism, and for other body functions.
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