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Keywords: trophic levels
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Journal Articles
The American Biology Teacher (2012) 74 (7): 518–520.
Published: 01 September 2012
... food webs energy flow trophic levels manipulatives assessment The National Science Education Standards ( National Research Council, 1996 ) include the concept that “Energy flows through ecosystems in one direction, from photosynthetic organisms to herbivores to carnivores and decomposers” as...