The normal flora of the adult large bowel consists predominantly of:
a. anaerobic species.
b. Staphylococcus.
c. Enterococcus.
d. Enterobacteriaceae.
A
The normal flora of the adult large bowel (colon) is established relatively early in life and consists predominantly of anaerobic species, including Bacteroides, Clostridium, Peptostreptococcus, Bifidobacterium, and Eubacterium. Aerobes, including Escherichia coli, other Enterobacteriaceae, enterococci, and streptococci, are outnumbered by anaerobes 1000:1.
You might also like to view...
Which of the following are pyrimidine nitrogenous bases?
A) guanine and adenine B) cytosine and uracil C) thymine and guanine D) ribose and deoxyribose E) adenine and thymine
Graph A shows that ant species richness
a. peaks at the equator. b. drops by 50 percent at 30 degrees north latitude. c. is less than 50 at 60 degrees north latitude. d. is somewhat greater at 30 degrees north latitude than at 30 degrees south latitude. e. includes all of these.
During which one of the following stages of the cell cycle do the chromosomes exist in the form of chromatin not really visible under the microscope?
A) metaphase B) anaphase C) interphase D) early part of telophase E) all stages of mitosis
The bulk of an herbaceous eudicot root consists of loosely arranged parenchyma cells in the:a
endodermis. b. pericycle. c. epidermis. d. cortex. e. periderm.