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During Passage Through the Large Intestine, a Trophozoite Will Often

question 68

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During passage through the large intestine, a trophozoite will often secrete a case around itself, forming a cyst. Cysts contain four haploid nuclei. When cysts "hatch" within a new host, two trophozoites are released. Thus, which of the following must happen within the cyst, prior to hatching?
1) meiosis
2) nuclear division
3) S phase
4) binary fission


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