Which statement does NOT apply to ecological studies? O A unit of time might be the "unit of observation" The sample size is the total number of people on whom the data is based They are subject to the ecological fallacy of applying population level associations to individuals They generally use statistics that have already been calculated for the groups as the variables Confounding is very difficult to control for with most ecological data

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Energy Flow

Energy flow is the continuous and directional flow of energy through living beings within an ecosystem. All living beings can be segregated into producers and consumers. These producers and consumers can be further divided in a food chain. The term ‘trophic level’ is assigned to each level of the food chain.