The Gram staining procedure is best described as a(n) _______ staining technique.

A. acid fast or Ziehl-Neelson
B. differential
C. capsule
D. Schaefer-Fulton
E. simple


Ans: B. differential

Biology & Microbiology

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Ethylene has the effect of causing fruits to:

A. enlarge B. ripen C. shrink D. elongate E. increase in juice content

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The tuberculin reaction develops within 30 minutes of the skin test in people with prior sensitization due to tuberculosis infection.

Answer the following statement true (T) or false (F)

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According to the biological species concept, which of the following statements is not correct?

(A) To be considered a species, a population must be reproductively isolated from other species (B) For a new species to arise, it must be geographically isolated from its parent species for long periods of time (C) Organisms that are phenotypically identical yet have distinct mating behavior are considered distinct species since they do not naturally interbreed (D) Organisms that can interbreed and produce sterile offspring are considered distinct species

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Which pair is properly matched?

a. chlorophyll a and photosynthesis b. chlorophyll a and vision c. indigo and photosynthesis d. indigo and vision

Biology & Microbiology