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 |