Sulfur Oxidation Is Carried Out by _____

Q32: Which is a primary symbiotic nitrogen fixer<br>A)Azotobacter<br>B)Rhizobium<br>C)Cyanobacteria<br>D)Clostridium

Q33: In the phosphorous cycle,inorganic phosphates are converted

Q34: Producers obtain CO₂ from _.<br>A)eating other producers<br>B)the

Q35: Which bacteria assisted in cleaning up after

Q36: Soil contains human pathogens,for instance _.<br>A)Clostridium tetani<br>B)Bacillus

Q38: Nitrogen-fixing bacteria:<br>A)oxidize ammonia to nitrates or nitrites<br>B)oxidize

Q39: Which term is correctly matched with its

Q40: A niche includes all of the following

Q41: Sulfate-reducing bacteria are characteristically _.<br>A)strict anaerobes<br>B)desulfovibrio<br>C)utilizing sulfate

Q42: Eutrophication leads to:<br>A)a decrease in oxygen<br>B)plants become