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Question
In which of the following biogeochemical cycles is the atmospheric phase absent/negligible?
Options:
A .  Nitrogen
B .  Carbon
C .  Phosphorus
D .  Water
E .  V, III, II, I and IV
Answer: Option C
:
C
The phosphorus cycle is unique among other major biogeochemical cycles in having no significant atmospheric component. The reason for this being that phosphorus, is solid at normal temperature and pressure and it does not circulate in the atmosphere. The largest reservoirs of this element are sedimentary rocks.

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