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Discuss the role of soil microorganisms in the global circulation of nutrients.
All of the following are involved in the environments of microorganisms except ...
1. biofilms.
2. loops.
3. mats.
4. bases.

Which of the following is NOT directly involved in microbial ecology?


1. Communities

2. Urbanisation

3. Populations

4. Ecosystems


What is NOT associated with nitrogen fixation?
1. Rhizobia
2. Nodules
3. Agrobacterium
4. Bacteroid
All of the following are associated with microbial interactions except _____.
1. rumen
2. mutualism
3. commensalism
4. conidium
Which of the following is NOT associated with marine environments?
1. Plasmolysis
2. Estuaries
3. Halotolerance
4. Blooms
Which of the following are NOT associated with aquatic environments?
1. Dissolved oxygen
2. Conjugants
3. Redfield ratio
4. Primary pro
. In the Winogradsky column the top part consists of ____.
1. O2 dominated mud
2. Rust- coloured zone
3. Anoxic H2S dominated zone
4. Red zone.
. All of the following are associated with microbial soil ecology except ____.
1. organic matter.
2. carbon to nitrogen ratio.
3. humus.
4. marine snow.
All of the following are most closely associated with the photic zone except ____.
1. element cycling
2. virioplankton
3. estuaries
4. pelagic
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