5. In order to control for abiotic processes in chemical assay, it is essential to include:
Select one:
a. A non-inoculate control
b. A substrate unamended control
c. A heat-killed control
d. Both A and C
e. All of the above
6. To account for the oxidation of residual carbon substrates in the medium you need to include a ________ control
Select one:
a. A non-inoculate control
b. A substrate unamended control
c. A heat-killed control
d. Both A and C
e. All of the above
7. How would you design a medium to enrich for microorganisms that can fix nitrogen and produce ammonia.
Select one:
a. Remove nitrate and nitrite from the medium
b. Remove ammonium from the medium
c. Remove oxygen because nitrogenous is oxygen-sensitive
d. Remove all nitrogen species from the medium
5. A 6.D 7. B
1 answer
How is #5 NOT a substrate unamended control?