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Food Chains and Webs

Biologists use the concept of food chains and food webs to describe the transfer of energy in a biological community or eco-system. Plants range from microscopic algae to huge redwoods – but they all derive energy from photosynthesis. They absorb and convert energy from the sun into the nutrients needed to grow, flower and seed. These are the producers. Animals can not make their own food, so they eat plants or other animals; they are the consumers. Bacteria, earthworms and fungi feed on organic matter, returning it to the soil for plants to reuse; they are the decomposers.