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Which of the following statements regarding biogeochemical cycles are correct? (i) Ecosystems are just like black boxes for many of the processes that take place within them. (ii) Ecosystem boundaries are permeable to some extent or other. (iii) The energy and nutrients can be carried over to and from one ecosystem to another via Imports and exports.

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Which of the following statements regarding biogeochemical cycles are correct? (i) Ecosystems are just like black boxes for many of the processes that take place within them. (ii) Ecosystem boundaries are permeable to some extent or other. (iii) The energy and nutrients can be carried over to and from one ecosystem to another via Imports and exports.






 
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