1- Microbial ecology is the study of a-microbial processes in the rhizosphere th
ID: 194521 • Letter: 1
Question
1- Microbial ecology is the study of
a-microbial processes in the rhizosphere that benefit plant
growth.
b-the diversity and activities of microorganisms.
c-the grouping and classifying of microorganisms.
d-microorganisms in their natural environments.
2- A Pasteur flask has a(n)
a-swan neck to prevent particulate matter from getting into the
main body of the flask.
b-double neck so two substances may be added at the same time.
c-secondary opening at the base to allow for drainage.
d-inverted upper edge to prevent spillage while swirling.
3-A pure culture
a. is sterile.
b. is a population of identical cells.
c. is made of a clearly defined chemical medium.
d. contains one microbial cell.
4-Martinus Beijerinck was the first to isolate
a- green algae.
b- certain nitrogen-fixing root nodule bacteria.
c- certain sulfate-reducing bacteria.
d- green algae, certain nitrogen-fixing root nodule bacteria, and certain sulfate-reducing bacteria.
Explanation / Answer
Ans1)microorganism in their natural environment
Ans2)a option is correct
Ans3)contain 1 microbial cell
Ans4)certain nitroge fixing root nodule bacteria.
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