To prevent the spread of pathogens that cause listeriosis, raw food and food-handling equipment can be decontaminated with
A) antibiotic spray.
B) radiation.
C) cold storage.
D) antibiotic spray, radiation, and cold storage.
Answer: B
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A trait with incomplete penetrance is one that:
A. is only expressed in homozygous recessive individuals. B. is only expressed in homozygous dominant individuals. C. is only expressed in some of the individuals that have the genotype for that trait. D. is expressed in only some offspring of affected individuals. E. can be expressed differently in different individuals that have the genotype for that trait.
Which of the following muscles contract during forceful exhalation?
a. the diaphragm b. external intercostals c. internal intercostals d. the diaphragm and external intercostals e. the diaphragm and internal intercostals
Which of the following do not obtain their oxygen by diffusion from surrounding water?
A. roundworms B. frogs C. dolphins D. sponges E. cnidarians
The descending arm of the loop of Henle is permeable to ____ but impermeable to ____.
A. water; potassium ions B. water; sodium ions C. sodium ions; water D. potassium ions; water E. All choices are incorrect.