Which of the following organisms has clear colonies on MacConkey agar, oxidizes glucose and xylose, and has the ability to hydrolyze esculin?
a. Alcaligenes xylosoxidans
b. Paracoccus yeei
c. Rhizobium radiobacter
d. Shewanella putrefaciens
C
R. radiobacter is the only organism listed that has these characteristics and hydrolyzes esculin.
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How did Darwin develop his theory of evolution?
A. Experimentation. B. Observation. C. Both experimentation and observation. D. Statistical analysis.
The study of the factors that influence changes in a population's size is
A. population density. B. population geology. C. population dynamics. D. population dispersion. E. population ethology.
Which of the following is NOT dependent on
the others as a source of food? a. carnivores b. herbivores c. producers d. detritivores e. decomposers
An infection of the thin layer of tissue around the inner cavities of the heart itself would affect the ________
A) sinoatrial node B) myocardium C) endocardium D) pericardium