Test # 98
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1500 questions in 150 tests. Each test contains 10 questions.
Idiom of the Day
pay (someone or something) a visit
to visit someone or something
I paid the tax office a visit to try and resolve my tax problem.
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Love in the Time of Giardia
Is it love or a diarrheal parasite? In this Valentines appropriate image, its the parasite. Caught on scanning electron microscope in the midst of dividinginto two separate organisms, thisGiardia lambllaparasite forms a heart, flagella untwining as the two new protozoa prepare to go their separate ways. When ingested by humans (usually through drinking contaminated water),Giardiaprotozoa cause a diarrheal disease called giardiasis.