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This diagram shows secondary succession occurring in a forest ecosystem that has experienced a fire. As these trees were burned in the fire which of the following was most likely released into the atmosphere? A. CO2 B. SiO2 C. H2O D. Au
Weegy: A. Wood burning does not release any more carbon dioxide than the eventual biodegradation of the wood if it was not burned. [ However, the carbon dioxide released through incineration occurs at a much faster rate than decomposition because burning wood takes a few seconds and decomposition takes years. Therefore, by burning wood one is releasing carbon dioxide into the atmosphere at a more concentrated rate than if one was to allow the wood fuel to decompose in soil. Wood harvesting and transport operations do produce varying degrees of greenhouse gas pollution. Inefficient and incomplete combustion of wood can result in elevated levels of greenhouse gases other than CO2, which may result in positive emissions where the byproducts have greater Carbon dioxide equivalent values ] User: Human tears contain an enzyme called lysozyme which damages the cell walls of bacteria. Which of the following best explains how this enzyme functions? A. Lysozyme kills bacteria by engulfing them. B. Lysozyme breaks through bacterial cell walls, killing the bacteria. C. Lysozyme catalyzes a reaction that breaks down bacterial cell walls. D. Lysozyme is destroyed as it digests bacterial cell wall molecules. Weegy: C. Lysozyme catalyzes a reaction that breaks down bacterial cell walls. Source: User: Which of the following is NOT a living organism? A. a muscle cell B. an amoeba C. a rosebush D. an earthworm Weegy: A. a muscle cell (More)
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Asked 9/14/2012 7:15:18 AM
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