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- Question
The sulfur pearl of Namibia, Thiomargarita namibiensis
Options- A. is the worlds largest bacterium
- B. stores high concentrations of nitrate in a huge internal vacuole which takes up 98% of the organisms volume
- C. Both (a) and (b)
- D. is the worlds smallest bacterium
- Correct Answer
- Both (a) and (b)
- 1. Hyphomycete fungi
Options- A. produce nonmotile tetaradiate conidia
- B. grow in leaves and the infected leaves are the preferred food source for some aquatic insects
- C. both (a) and (b)
- D. none of the above Discuss
- 2. Which of the following is correct?
Options- A. Ultramicrobacteria or nanobacteria are the dominant bacteria in marine systems
- B. Ultramicrobacteria or nanobacteria are so numerous that they are a major food source for heterotrophic flagellates
- C. Both (a) and (b)
- D. none of the above Discuss
- 3. __________ is an environment like __________ where microorganisms are functioning in an extremely thin film of water and where oxygen-containing air is close to them.
Options- A. low oxygen diffusion environment; soils
- B. high oxygen diffusion environment; soils
- C. low oxygen diffusion environment; lakes
- D. high oxygen diffusion environment; lakes Discuss
- 4. The rate of flux of oxygen in air is __________ to/than the rate of flux of oxygen in water.
Options- A. greater
- B. lesser
- C. approximately equal
- D. half Discuss
- 5. Coliforms are used as indicator organisms because
Options- A. they are present wherever enteric pathogens are present
- B. a testing procedure with great specificity is easy to perform
- C. both (a) and (b)
- D. none of the above Discuss
- 6. Loss of carbon through the microbial loop in oligotrophic environments is __________ to/than the loss of carbon through the microbial loop in copiotrophic environments.
Options- A. greater
- B. lesser
- C. approximately equal
- D. half Discuss
- 7. Which of the following species in water reveal the presence of fecal pollution of human or animal origin?
Options- A. E.coli
- B. Fecal Streptococci
- C. Clostridium perfringens
- D. All of these Discuss
- 8. Members of all of the following genera of bacteria typically are found in a maturing Winogradsky column except
Options- A. Clostridium
- B. Rhodospirillum
- C. Chlorobium
- D. Escherichia Discuss
- 9. The Redfield ratio is an index of concentration of
Options- A. carbon, hydrogen and oxygen
- B. nitrogen, potassium and iron
- C. carbon, nitrogen and phosphorous
- D. carbon, phosphorous and sulfur Discuss
- 10. Which of the following is correct?
Options- A. A Winogradsky column is used to filter out microorganisms from a water sample taken from a deep black smoker
- B. A Winogradsky column is used to demonstrate interactions and gradients that occur in aquatic environments
- C. Both (a) and (b)
- D. A Winogradsky column is used to filter out microorganisms from non-aquatic environments Discuss
Microbes in Aquatic Environment problems
Search Results
Correct Answer: both (a) and (b)
Correct Answer: Ultramicrobacteria or nanobacteria are the dominant bacteria in marine systems
Correct Answer: high oxygen diffusion environment; soils
Correct Answer: greater
Correct Answer: both (a) and (b)
Correct Answer: greater
Correct Answer: All of these
Correct Answer: Escherichia
Correct Answer: carbon, nitrogen and phosphorous
Correct Answer: A Winogradsky column is used to demonstrate interactions and gradients that occur in aquatic environments
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