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Worksheets4 Microorganisms in Their Natural Envts (Soil, Water, Air)
Total questions: 10
Worksheet time: 5mins
Refers to the community of organisms that inhabit the surface layer of water bodies, particularly at the air-water interface.
Pleuston
Neuston
Littoral zone
Benthos
Neritic zone
Generally, when the altitude increases, what happens to the atmospheric pressure, temperature, and concentration of available oxygen?
decrease, increase, decrease
increase, increase, increase
decrease, decrease, increase
decrease, decrease, decrease
increase, decrease, increase
Which of the following is not a reason why spores are better adapted in the atmosphere?
Metabolically active
Produced in very high numbers
Relatively of small size and low density
With protective structures
Which of the following is true about the atmo-ecosphere?
Substantial microorganisms in the upper troposphere
Several viral and bacterial (not fungal) diseases are spread through the atmosphere
No known autochthonous microorganisms
There are no reports on temporary locations in the troposphere that may provide habitats for microorganisms
Which soil horizon does maximal accumulation of materials such as iron oxides, aluminum oxides, and silicate clays occur?
A
B
O
C
R
Which of the following is NOT true about soil microflora?
Very few microorganisms are free in the soil solution
Most microorganisms reside in microcolonies attached to the soil particles
Microorganisms are autochthonous
All groups of microorganisms are represented in the soil.
Which of the following factors DOES NOT affect soil microflora?
Moisture
Temperature
Oxygen concentration
pH
All of the aforementioned effect soil microflora
Which DOES NOT describe the limnetic zone of lakes?
It is the region of the lake where light penetrates to the bottom.
The dominant primaryproducers are planktonic algae.
It is an area of open wateraway from the shore
The compensation depth of this zone is the lowest level of effective light penetration
None of the aforementioned
Which is NOT a characteristic of oligotrophic lakes?
They have low concentrations of nutrients
Typically, they are deep, have a larger hypolimnion than epilimnion.
They have relatively lowprimary productivity
Oxygen concentrations are usually lower in oligotrophic lakes due to low primary productivity.
None of the choices
Which of the following is NOT a function of freshwater microorganisms?
Decompose dead organic matter
Assimilate and introduce dissolved organic matter
Perform mineral cycling activities
Contribute to secondary but not primary productivity
Food source
