The transmission of enteric hepatitis is most effectively prevented by
A) safe sex practices.
B) immunization.
C) reducing aerosol dispersion.
D) vector control.
E) good public sanitation and personal hygiene.
E
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Some viruses have the ability to stimulate uncontrolled growth of the host cells, resulting in cancer. Which virus has oncogenic properties?
a. Measles b. Papilloma c. Retroviruses d. Influenza
The slow-growing organism Trichophyton rubrum produces a flat or heaped-up colony, generally white to reddish with a cottony or velvety surface. The cherry-red color is best observed on the reverse side of the colony. This organism is capable of infecting which of the following?
a. Hair and nails b. Skin and nails c. Hair and skin d. Hair, skin, and nails
Which trait allowed for evolutionary innovations in body form?
a. bilateral symmetry b. segmentation c. coelomate evolution d. ectoderm development e. gastrovascular cavities
Restriction enzymes recognize and cut DNA at specific nucleotide sequences. Indicate whether the statement is true or false