Autotrophs produce their own food through photosynthesis, which is critically important to life on Earth, while heterotrophs rely on other organisms for food.
Autotrophs are organisms that can produce their own food from inorganic raw materials through processes like photosynthesis, while heterotrophs depend on other organisms for food.
Autotrophs can make food through photosynthesis and chemosynthesis. Photosynthesis is quantitatively more important and is performed by plants, algae, and some bacteria.
The flow of energy through a food chain starts with the sun as the original source, then moves through producers, consumers, and decomposers, culminating in its ultimate form as heat.
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