A young woman being treated for serious burns develops severe diarrhea accompanied by intense abdominal pain. She passes several watery, foul-smelling, bloody stools a day. A colonoscopy reveals patches of yellowish lesions in the large intestine. The
probable causative agent is
A) Giardia intestinalis.
B) Clostridium difficile.
C) Campylobacter.
D) Salmonella enterica serotype Typhi.
E) Vibrio cholerae.
B
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The ________ are fungi that have lost the ability to reproduce sexually.
A. zygomycetes B. ascomycetes C. basidiomycetes D. imperfect fungi
Pollination begins when pollen is transferred from the ________ to the ________ of a flower.
A. anther; ovary B. stigma; embryo sac C. anther; receptacle D. synergid; egg E. anther; stigma
Which structure, A, B, C, or D, returns nearly all nutrients to the interstitial fluid?
1.A
2.B
3.C
4.D
DNA replication occurs
a. between the gap phases of interphase. b. immediately before prophase of mitosis. c. during prophase of mitosis. d. during prophase of meiosis. e. at any time during cell division.