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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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Wrogue Wrogue
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9 years ago
The biogeochemical cycles are considered to have been in a planetwide steady-state condition for the last ________ billion years.
A) ten
B) one thousand
C) one million
D) one billion
E) one trillion
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GeoExpGeoExp
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9 years ago
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Wrogue Author
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#2
9 years ago
Your assistance has been above and beyond my expectations! So glad to have joined this forum. Thanks, and will mark as this thread officially solved Smiling Face with Open Mouth
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#3
9 years ago
Always nice to know I've helped.
Good luck with the rest of them.

- GeoExp
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