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Professor Wyler has obtained a grant from the National Institute of Mental Health to study the effects of violence in film on attitudes towards aggression among teenagers. He would like to study the effects in a range of socio-economic settings, from impoverished to very wealthy communities. Should he obtain approval from his institutional review board? Why or why not? Discuss potential ethical issues that he should consider related to research in an impoverished community.
Ecological Efficiency
The efficiency with which energy is transferred from one trophic level to the next in an ecosystem. Typically only a small percentage of energy is passed on to the next level.
Trophic Level
A step in a food chain or food web, representing the position of organisms in the flow of energy through an ecosystem.
Percentage
A mathematical term representing a fraction of 100, used to describe proportions or ratios.
Fresh Water
Water that contains minimal amounts of dissolved salts, especially found in lakes, rivers, and streams, as opposed to salt water.
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