In which of the following situations would Staphylococcus epidermidis be the most likely etiologic agent?
A.) otitis media
B.) food intoxication
C.) urinary bladder infection
D.) infected IV catheter site
E.) conjunctivitis
Answer: D.) infected IV catheter site
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The organisms believed to be the first to use two different photosystems in a single photosynthetic electron-transport chain are the:
A. yeast. B. archaea. C. cyanobacteria. D. algae. E. green plants.
Which of the following statements correctly describes the behavior of a tetrad during anaphase I of meiosis?
A) It travels intact to one pole of the dividing cell. B) It splits into two pairs of sister chromatids, and one pair goes to each pole of the dividing cell. C) It splits into two pairs of homologous, nonsister chromatids, and one pair goes to each pole of the dividing cell. D) It splits into four chromosomes, which distribute in random pairs to the two poles of the dividing cell.
Approximately 99% of the water that is filtered in the glomerulus is reabsorbed.
Answer the following statement true (T) or false (F)
Which of the following organisms is an ectotherm?
a. elephant b. lizard c. owl d. bat e. human