How Does Phosphorus Normally Enter Ecosystems

Question

How does phosphorus normally enter ecosystems?
A)cellular respiration
B)photosynthesis
C)rock weathering
D)vulcanism
E)atmospheric phosphorous gas

Accepted Answer

Phosphorus normally enters ecosystems through rock weathering. As rain and other forms of precipitation fall on rocks, they slowly wear down the rock and release the phosphorus it contains. The phosphorus then becomes available for plants to absorb through their roots, and from there it enters the food chain.