The preservation of beef jerky from microbial growth relies on which method of microbial control?
A) filtration
B) lyophilization
C) desiccation
D) ionizing radiation
E) supercritical CO2
C
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Keystone species are those that ________
a. modify the pioneer environment, allowing subsequent stages in succession to occur b. after introduction, become established and disruptive to the native structure of a community c. have a disproportionate effect on a community relative to their abundance d. provide the photosynthetic plant base necessary to all communities
The most common leukocyte in the blood is
a. a lymphocyte. b. an eosinophil. c. a basophil. d. a neutrophil.
Why are some proteins more likely than others to diverge within a species?
What will be an ideal response?
Long-term sequelae of Group A streptococcal infections include all the following, except:
A. risk decreased with prompt treatment of skin infections and pharyngitis. B. development of rheumatic fever. C. appearance of sequelae within a few weeks after an initial infection. D. transmission of sequelae via respiratory secretions from a patient with streptococcal sore throat. E. development of acute glomerulonephritis.