Phosphorous Cycle

Question 1

Phosphorus

Answer 1

Component of of ATP,phospholipids and nucleic acids
Exists mostly as phosphate ions in the form of sedimentary rock deposits - weathering and erosion of rocks helps phosphate ions to become dissolved and available for absorption by plants

Question 2

Mycorrhizae

Answer 2

Mutual symbiotic associations between certain fungi and the roots of the vast majority of plants
The fungi acts like extensions of the roots, increasing surface area for absorption and they also gold water and minerals around the roots which helps the plant survive droughts

Question 3

How is phosphate ions secreted and transported

Answer 3

Excess phosphate ions are excreted and accumulate in waste material
When plants and animals die, decomposes break them down releasing phosphate ions into water or soil
Some phosphate ions will remain in bones and shells, which take longer to break down
Dissolved phosphate ions are transported by streams and rivers to lakes and oceans and form sedimentary rocks