Which of the following is not an example of symbiotic nitrogen fixation?
A) Rhizobium with leguminous plants
B) Azotobacter with certain photosynthetic protists
C) Anabaenea with a water fern
D) Frankia with woody shrubs
Correct Answer:
Verified
Q15: The carbon cycle begins with _.
A)the conversion
Q16: Some microbes convert iron to magnetite which
Q17: Microbes sometimes make metals such as mercury
Q18: Which of the following does not contribute
Q19: The process of nitrogen fixation involves the
Q21: Sulfate and sulfite reductions carried out by
Q22: Forests are generally regarded as CO2 _.
A)sources
B)sinks
C)both
Q23: When nitrate is reduced to dinitrogen gas
Q24: Biomagnification involves compounds having higher relative concentrations
Q25: Biological nitrogen fixation is carried out _.
A)by
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