“which of the biogeochemical cycles does not utilize the atmosphere? ”

Phosphorous cycle. It differs from the other major biogeochemical cycles in that it does not include a gas phase

Competition. interaction among organisms that compete for the same natural resource (food, shelter, water, space) in an ecosystem. predation. an interaction in which one organism kills another for food. predator. prey. symbiosis. mutualisum. commensalisum. parasitisum.

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