An electron microscope uses ________ lenses to focus beams of electrons onto a specimen.
Fill in the blank(s) with the appropriate word(s).
magnetic
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Polyandry is the mating system in which ____
a. one male and one female form a long-term association b. both males and females mate with multiple partners c. one male mates with many females d. one female mates with many males e. both males and females provide care to offspring
This tissue lines blood and lymph vessels
a. A b. B c. C d. D e. E
Which of the following contributes to infection with Trichomonas vaginalis?
A) contact with contaminated fomites B) compromised immunity C) careless handwashing habits D) preexisting disease (chlamydia, for example) E) living in an undeveloped area of the world
Rodents are the normal hosts for which of the following encephalitis viruses?
A) eastern equine encephalitis (EEE) B) St. Louis encephalitis C) Venezuelan equine encephalitis (VEE) D) western equine encephalitis (WEE) E) West Nile virus