Lyme disease is a bacterial disease that is transmitted to humans when a black-legged tick that
is infected with the bacterium bites and feeds on a human. In this scenario, the tick is an
example of a __________.
a. cyst
b. vector
c. primary host
d. pathogen
B
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Urinary tract infections
A. are relatively rare. B. are the most common nosocomial infections. C. include puerperal fever. D. are not considered STIs. E. are the most common nosocomial infections AND are not considered STIs.
When atoms gain or lose electrons, they become negatively or positively charged. These negatively or positively charged atoms are known as
A. isomers. B. unstable atoms. C. ions. D. isotopes.
Which of the following statements about the nitrogen cycle is true?
A) The nitrogen cycle requires different types of bacteria. B) Nitrogen gas is converted to nitrates in plant leaves. C) Nitrogen cannot be cycled through living organisms. D) When plants and animals die, nitrogen is removed from the nitrogen cycle
A highly specific diagnostic test will be unlikely to indicate a positive result if a specimen being tested is a true negative
Indicate whether the statement is true or false