Phoshorous cycle & fertiliser

Question 1

Role of mycorrhizae

Answer 1

-Act as an extension of the plant root system, increasing surface area
-Act as a sponge to hold water close to plant roots
-They get respiratory substrate, as the plant gets other benefits

Question 2

Enviromental concernes of fertiliser

Answer 2

-Reduces species diversity
-Leaching
-Eutrophication in bodies of water, algae bloom

Question 3

Molecules that need phosphate

Answer 3

-ATP
-DNA
-Phospholipid membrane

Question 4

Phosphate cycle

Answer 4

-Phosphorus is released from rocks into the soil and water sources in the form of phosphate ions
-Phosphate ions are taken up by plants through or absorbed from water by algae
-phosphate ions are transferred to consumers during feeding
-Phosphate ions in excretion and dead organisms are released into the soil or water during decomposition by saprobionts
-The phosphate ions are taken up by producers or trapped in sediments, making rock