Design a system for organizing trophic levels. Your system should include at least two of the following:
a place for each trophic level (producers, primary consumers, secondary consumers, decomposers)
a way to indicate the transfer of energy
a way to indicate the relationships between the different populations or trophic levels
Give a written description of your system in the text box provided.

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hi, natural selection of the peppered moth during the industrial revolution in 19th-century england is an example of an outlier in the study of evolution. during this time, pollution from factories filled the forests, coating trees in a layer of soot—turning white trees black

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many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.