Of the belemnites thought to be extinct, the Challenger Expedition discovered the living fossil genus:
a. Spirula.
b. Latimeria.
c. Neopilina.
d. Calyptegena.
A
Biology & Microbiology
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Which of the following is a function of pasteurization?
A. Increasing the shelf life of the product B. Killing pathogenic microorganisms C. Reducing the total microbial population D. All of the choices are correct.
Biology & Microbiology
The water from rivers eventually flows into
a. aquifers. b. groundwater. c. oceans. d. surface water runoff.
Biology & Microbiology
All forms of horizontal gene transfer require both the recipient and donor bacteria to be alive.
Answer the following statement true (T) or false (F)
Biology & Microbiology
Diazotrophs are microorganisms that
a. reduce nitrate (NO3–) to nitrite (NO2–). b. oxidize nitrite (NO2–) to nitrate (NO3–). c. oxidize ammonia (NH3) to nitrate (NO3–). d. fix atmospheric nitrogen (N2).
Biology & Microbiology