A Petri dish containing isolated colonies of Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa would be described as being

A) A mixed culture
B) An axenic culture
C) A pure culture
D) A contaminated culture


A) A mixed culture

Biology & Microbiology

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After the bacteria were left in the dark for two minutes, the bacteria were

a. evenly distributed throughout the chamber. b. clustered on the algal filament. c. clumped along certain areas of the algal filament. d. actively avoiding the algal filament.

Biology & Microbiology

The bubbles in beer are ____

a. carbon dioxide b. oxygen c. ethanol d. pyruvate e. nitrous oxide

Biology & Microbiology

Which taxa contain the largest number of known species?

A) coleoptera B) plants (embryophytes) C) fungi D) crustaceans

Biology & Microbiology

The structure that attaches a chromosome to a microtubule is called a(n)

a. centriole. b. MAR. c. kinetochore. d. spindle. e. MTOC.

Biology & Microbiology