Preservation of fermented meat products is accomplished by
A. the lower water activity.
B. pasteurization.
C. the lower pH.
D. the lower pH and lower water activity.
E. All of these choices are correct.
Answer: D
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If the copy number of a proto-oncogene is increased by gene duplication then the proto-oncogene has undergone
A. a missense mutation. B. gene amplification. C. a chromosomal translocation. D. retroviral insertion. E. a nonsense mutation.
Thick, water-storing leaves and stems and wax-coated leaves are adaptations to:
A) deserts. B) tropical rain forests. C) northern coniferous forests. D) tropical scrub forests. E) temperate deciduous forests.
One of the new technologies developed from tissue culture and genetic engineering is plant hybridization.
a. true b. false
Encephalitis caused by arboviruses involves
A. coma, convulsions, and paralysis in severe cases. B. muscle aches and joint stiffness. C. fever, headache, and rash. D. myalgia and orbital pain. E. All of the choices are correct.