A microbiologist studying the human microbiome is interested in how a particular bacterial species may impact water absorption in the large intestine. Which of the following models is appropriate for this investigation?
A. A normal mouse colonized with enteric microbiota found in the human colon.
B. A germfree mouse inoculated with human microbiota shortly after birth.
C. A human volunteer who is a carrier of that particular bacterial species.
D. A germfree mouse raised in a sterile environment.
Answer: D
Biology & Microbiology
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