13. What group of bacteria are involved in the process of nitrification? A. nitrogen-fixing bacteria C. decomposing bacteria B. denitrifying bacteria D. nitrifying bacteria
14. Which of the following processes releases phosphorus from phosphate containing sedimentary rocks? A. Mining B. Decomposition C. Absorption D. Burning
15. What will be formed when sulfur dioxide combines with water in the atmosphere? A. weak hydrochloric acid C. strong nitric acid B. strong sulfuric acid D. weak sulfuric acid
16. Which of the following is the byproduct of phytoplankton decomposition? A. dimethylsulfide C. methylsulfide B. ethersulfide D. ethylsulfide
17. What do you call to a rain that contains weak sulfuric acid? A hot rain B. cold rain C. acid rain D natural rain
18. What do you call to a phosphorus-rich droppings? A. Guavano B. Guyabano C. Guano (D) Cyano
19. Which of the following processes are involved in the transfer of sulfate from sulfur containing rocks to plants? A. decomposition B. volcanic eruption C. absorption D. weathering
20. Which of the following processes releases sulfur dioxide and hydrogen sulfide in the atmosphere? A. decomposition B. volcanic eruption C. decay D. weathering

paki sagot po na maayos pls ​