Uses of chlorofluorocarbons include each of the following EXCEPT
a. gasoline additives.
b. air conditioner coolants.
c. refrigeration coolants.
d. plastic packaging.
e. solvents.
A
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An outbreak of severe diarrhea occurs in an intensive care wing of a major hospital. As a result, the patients are all screened for colonization and infection by the pathogenic organism. However, not all of the patients identified carrying the organism by phenotypic identification and characte-rization are displaying symptoms of infection. The reason for this discrepancy is:
a. some patients have a stronger immunity to the pathogenic organism. b. the patients who are not displaying symp-toms have been on antibiotics and the or-ganism has mutated and is no longer pa-thogenic. c. the patients are not all infected with the same strain of the organism that is carrying the enteric toxin causing the diarrhea. d. the laboratory has likely misidentified the organisms.
Four of the five answers are conditions that may help to break dormancy of seeds. Select the exception
a. abrasion of the seed coat b. freezing temperatures c. bright light d. fire e. salty soil conditions
_______ are a type of cilia; used to move things to mouth parts; aids in feeding
Fill in the blank(s) with the appropriate word(s).
Angiosperms include all
A. flowering plants. B. gymnosperms. C. ferns. D. mosses.