If You Were Tracking a Nutrient Molecule Through an Ecosystem

question 78

Multiple Choice

If you were tracking a nutrient molecule through an ecosystem, which of the following statements would you expect to verify?

• A)Molecules move through all ecosystems at the same constant rate, as the laws of physics would predict.
• B)Because of the liquid nature of the aquatic ecosystem, nutrient molecules move through it more rapidly than forest ecosystems.
• C)Vertical mixing is essential for high productivity in aquatic ecosystems.
• D)Most nutrient molecules leave an ecosystem, but are later replaced from another ecosystem.
• E)A, B, C, and D are all correct.

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