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Starting with the European settlers, humans have introduced earthworms from Europe and Asia into North American forests. These introductions continue through the transport of soil that contains non-native earthworms, such as during construction, and through the release of non-native earthworms used for fishing. The effects of non-native earthworms are especially large in forests that did not have any native earthworms. For example, forests of the Great Lakes region did not previously have earthworms until humans introduced them. When non-native earthworms are introduced, the thick layer of leaf litter disappears quickly, thereby altering biogeochemical cycles.
-Predict the fate of a phosphorus atom after a non-native earthworm consumes leaf litter in a forest.
A) It becomes incorporated into the earthworm as an energy-storing molecule.
B) It is excreted as ammonium.
C) It is released during cellular respiration as PO43-.
D) It is weathered into rocks.
Correct Answer:
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