Which is a primary symbiotic nitrogen fixer
A) Azotobacter
B) Rhizobium
C) Cyanobacteria
D) Clostridium
Correct Answer:
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Q12: The loss of water from pores of
Q13: The mechanism whereby Rhizobium and the legume
Q14: Which of the following microbes is not
Q15: Nitrogen-fixing bacteria include:
A)Cyanobacteria
B)Clostridium
C)Klebsiella
D)all of these choices
Q16: Microbes in the environment can be _.
A)producers
B)consumers
C)decomposers
D)all
Q18: In the sulfur cycle many microbes convert
Q19: Most denitrification is due to _.
A)Rhizobium
B)Azotobacter
C)Pseudomonas
D)Nitrosomonas
Q20: Which of the following statements about ecology
Q21: What results from the biological oxygen demand
Q22: Cytophaga,found in soil,is characterized by _.
A)being a
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