Lesson5- 3.5c(Phosphorous Cycle)

The phosphorous cycle

Plants and animals need phosphorous to make …1? molecules such as phospholipids, DNA and ATP.

Phosphorous is found in r…2? and dissolved in the oceans in the form of …3?(PO4* 3-)

Info: Phosphate ions dissolved in water in the soil can be absorbed and made into more complexed molecules (assimilated) by plants and other producers.

1. Biological

2. Rocks

3. Phosphate ions

The phosphorous cycle

1. Phosphate ions in rocks are released into the …1?

2. Phosphate ions are taken into plants through ..2?. …3? greatly increase the rate of this

3. Phosphate ions are transferred through the food chain as animals …4? the plants and are eaten by other animals

4. Phosphate ions are lost from the animals in …5? products

5. When organism die, …6? break down the organic compounds, releasing phosphate ions into the …7?.

   These microorganisms also release phosphate ions from animal …8?.

6. …9? of rocks releases phosphate ions into seas, lakes and …10?.

7. These are taken up by aquatic …11?, such as algae, and passed along the food chain to …12?.

8. The waste produced by sea birds is known as …13? and contains a …14? proportion of phosphate ions.

9. Guano returns lots of phosphate ions to …15? and is often used as a natural …16?.

1. Soil

2. Roots

3. Mycorrhizae

4. Eat

5. Waste

6. Saprobionts

7. Soil

8. Waste

9. Weathering

10. Rivers

11. Producers

12. Birds

13. Guano

14. High

15. Soil

16. Fertilizer

Answer image wuestion

Answer image question?