| Question | Answer |
|---|---|
| A set of guilds is referred to as | Community |
| All of the following are free-living, nitrogen-fixing bacteria except: | Rhizobium |
| Which of the following is not found in the atmosphere? | Phosphorus |
| Which of the following zones is present only in oceans? | Abyssal zone |
| Most marine microorganisms are present in the: | Littoral zone |
| Which of the follwing is a category A agent? | Bacillus anthracis |
| Category B agents include: | Vibrio cholerae |
| Which of the following is the fourth most abundant element in the universe? | Carbon |
| The process by which nitrate is reduced to nitrogen is called: | Denitrification |
| Eutrophication is a term used in the | Phosphorus cycle |
| A region or regions of the earth populated by living organisms is referred to as | biosphere |
| the physical location where organisms are found is called a | habitat |
| the conversion of Carbon Dioxide (CO2) to organic molecules is called | carbon fixation |
| Cholera is considered a category what disease? | B |
| Rhizobium is involved in which cycle | Nitrogen |
| Populations of mircoorganisms that perform linked metabolic activities | Guilds |
| Physical locations where organisms are found | Habitats |
| Regions of the earth populated by living organisms | Biospheres |
| Consists of the sediments at the bottom of a lake | Benthic zone |
| deeper water located below the limnetic zone | Profundal zone |
| upper layer of water away from the shore | limnetic zone |
