In the phosphorus cycle, weathering makes phosphate available first to:

Related Mcqs:

1. The air pollution caused by phosphate fertilizer factories is due to:The air pollution caused by phosphate fertilizer factories is due to:

   A. Phosphene
   B. SiF4
   C. Dust
   D. Halogens

2. The biological weathering occurs due to the action of:

   A. Acids
   B. Alkalies
   C. Oxygen
   D. Carbon dioxide

3. The processes involved in the chemical weathering are:

   A. Carbonation and oxidation
   B. Hydrolysis and chelation
   C. Hydrolysis and reduction
   D. All of these

4. The biological weathering commonly brought about by:

   A. Algae
   B. Bacteria
   C. Fungi
   D. Lichens

5. Phosphate pollution is caused by:

   A. Phosphate rock only
   B. Agricultural fertilizers only
   C. Sewage and phosphate rock
   D. Sewage and agricultural fertilizers

6. A plant, being eaten by a herbivore which in turn is eaten by a carnivore, makes a:

   A. Food chain
   B. Web of food
   C. Biomass
   D. Interdependence

7. Which of the following is logical sequence of carbon cycle:

   A. Photosynthesis-consumer-decomposer
   B. Decomposer-consumer-photosynthesis
   C. Photosynthesis-decomposer-consumer
   D. Consumer-photosynthesis-decomposer

8. Which ecological cycle is directly driven by sunlight?

   A. Hydrologic
   B. Phosphorus
   C. Nitrogen
   D. Sulphur

9. Hydrological cycle is under the control of:

   A. Grasslands
   B. Forests
   C. Planktons
   D. Epiphytes

10. Which one of the following pairs is a sedimentary type of biogeochemical cycle?

    A. Oxygen and nitrogen
    B. Phosphorus and Sulphur
    C. Phosphorus and CO2
    D. Phosphorus and nitrogen