In the presence of penicillin, a cell dies because
A) it lacks a cell wall.
B) it plasmolyzes.
C) it undergoes lysis.
D) it lacks a cell membrane.
E) its contents leak out.
C
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Carl Woese's evolutionary studies that led him to propose the three domain taxonomic system compared nucleotide sequence present in:
A) the nuclei of eukaryotic cells B) 16S rRNA genes C) cyanobacteria D) thermophiles E) DNA polymerase genes
Prominence or increase in the population of Candida sp. in the oropharynx might be expected
A. normally in adults B. after penicillin therapy C. after broad-spectrum combined drug therapy D. with antibody deficiency E. none of the above
A patient arrives at a hospital suffering from serious difficulty breathing and shortness of breath. Initial tests indicate none of the standard respiratory infectious agents are present. The physician suspects an immune disorder. What clinical indicators would distinguish between asthma, pneumonitis and Pneumocystis pneumonia?
What will be an ideal response?
All of the following are adaptations to remain stationary in the ever-shifting soft bottom of estuaries except:
a. extensive roots and rhizomes. b. holdfasts. c. sessile lifestyle. d. operculum. e. byssal threads.