The laboratory receives a bloody, tissue contaminated surgical forceps. Upon removal the laboratory should dispose of the instrument by:
a. placing in the biohazard container.
b. placing in a sharps container.
c. sending back to surgery for disposal.
d. ensuring proper return to surgery for chemical sterilization.
D
Surgical forceps should not be placed in any container for disposal in the microbiological labor-atory. Care should be taken to properly return to surgery. Due to the nature of many surgical in-struments, methods of sterilization that include moisture and heat may corrode or damage in-struments. Therefore they are often sterilized by utilization of ultraviolet light or chemical steri-lization to maintain the integrity of the instruments.
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Colonial cnidarians
a. include Obelia. b. include the Portuguese man-of-war. c. include corals. d. may harbor dinoflagellate symbionts. e. fit all of these descriptions.
Nucleotide substitutions are mutations that alter the ____________________, but not the ____________________, of
nucleotides in a DNA molecule. Fill in the blank(s) with the appropriate word(s).
The chemical group box 1 in the accompanying figure is a:
a. pyrimidine. b. purine. c. phosphate. d. amino acid. e. covalent bond
Adult male humans generally have deeper voices than do adult female humans, which is the direct result of higher levels of testosterone causing growth of the larynx
If the fossil records of apes and humans alike show a trend toward decreasing larynx size in adult females and increasing larynx size in adult males, then _____. A) sexual dimorphism was evolving over time in these species B) intrasexual selection seems to have occurred in both species C) stabilizing selection was occurring in these species concerning larynx size D) selection was acting more directly upon genotype than upon phenotype