Here's a breakdown:
* Rocks: Approximately 95% of the Earth's phosphorus is found in rocks, mainly in the form of apatite. This phosphorus is not readily available for biological use.
* Ocean: A significant amount of phosphorus is found dissolved in the ocean.
* Soil: The soil contains a smaller but important amount of phosphorus, which is available for plants to absorb.
* Living organisms: A tiny amount of phosphorus is present in living organisms, including plants, animals, and microorganisms.
It's important to note that phosphorus is a finite resource, and its availability for use by living organisms is limited. The phosphorus cycle is a key process that helps move phosphorus from rocks to living organisms and back again.
