Two doses of the MMR vaccine provide full protection from infection with the mumps virus
Indicate whether the statement is true or false
FALSE
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Most of the ultraviolet radiation reaching the upper atmosphere is absorbed by
A. CFCs. B. ozone. C. nitrogen. D. carbon dioxide. E. water vapor.
Newborn babies acquire microbiota by
A. passing through the birth canal. B. breastfeeding. C. contact with mother's skin. D. environment. E. All of the above are a source of microbiota.
A blood alcohol concentration greater than ____ may be fatal
a. 0.08 per milliliter b. 0.4 per milliliter c. 0.02 per milliliter d. 0.05 per milliliter e. 0.2 per milliliter
Bacteria methylate their DNA in order to:
a. prepare for DNA replication. b. prepare for mitosis. c. effectively infect other cells. d. protect it from restriction enzymes. e. prevent viral DNA from hybridizing with bacterial DNA.