Multiple Choice
In most soils the overall population (numbers) of microorganisms changes with time,generally following changes in the _____.
A) supply of decomposable organic matter
B) supply of oxygen
C) pore space
D) availability of root infection sites
E) concentrations of antibiotics
Correct Answer:

Verified
Correct Answer:
Verified
Q25: Which of the following groups is not
Q26: Most soil organisms are heterotrophs.
Q27: Soil microorganisms often compete with higher plants
Q28: Many members of which group of soil
Q29: Members of this (these)microbial group(s)are responsible for
Q31: This (these)group(s)of microorganisms usually predominate(s)in sandy,acid soils.<br>A)actinomycetes<br>B)bacteria<br>C)fungi<br>D)both
Q32: In which situation are the actinomycetes likely
Q33: Organisms which use carbon dioxide or carbonates
Q34: In nature,beneficial mycorrhizae form with the roots
Q35: An organism that subsists by eating predators