An instrument that will come into contact with only the skin of a patient should be disinfected with a(n)
A. high-level germicide.
B. low-level germicide.
C. intermediate-level germicide.
D. degerming agent only.
E. germistatic agent only.
Answer: B
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Which of the following statements best describes the habitats of Acidovorax, Sphingobacterium, and Sphingomonas?
a. Habitats are limited to the upper respira-tory tract of various mammals. b. Habitats are unknown. c. Habitats are limited to the soil and water environment. d. Habitats are limited mostly to water sources.
Individuals heterozygous for the RB+ and RB? alleles can develop tumors as a result of (Select all that apply.)
A) a mitotic crossover that leads to homozygosity for RB+ in some cells and RB? in other cells. B) a somatic mutation in the RB+ allele that leads to homozygosity for RB?. C) a somatic mutation in the RB? allele that leads to homozygosity for RB+. D) the fact that RB? is dominant to RB+.
Foraminiferan shells are made of
A. cellulose. B. chitin. C. calcium carbonate. D. peptidoglycan. E. silica.
Which of the following organs of the endocrine system secretes thyroxine and calcitonin?
a. pituitary gland b. pancreas c. hypothalamus d. adrenal glands e. thyroid gland