Biofilms provide an alternative means for bacteria to attach to surfaces within the body.
Answer the following statement true (T) or false (F)
True
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Spirilla and spirochetes are closely related bacteria that exhibit a unique corkscrew motility
Indicate whether the statement is true or false.
Which one of the following methods of antimicrobial susceptibility testing is the most accurate? (Note: information about susceptibility testing can be found on the CD-ROM that accompanies this book.)
A) agar dilution method B) disk-diffusion method C) macro broth dilution method D) micro broth dilution method
Which organism has a challenge to maintain cellular electrolyte and fluid balance in its environment?
A. A bacterium in Great Salt Lake B. A bacterium in a fresh-water lake C. A protozoan in a fresh water lake D. All of the above have problems in maintaining electrolyte and fluid balance within the cell.
Angiosperms have two separate gametophytes because
A. this is normal for alternation of generations. B. one can survive and fertilize without the need for external water. C. this is normal for all sexually reproducing plants, where sperm are produced by microgametophytes and eggs by megagametophytes. D. these two structures allow fertilization without the need for external water. E. the microgametophyte is haploid and the megagametophyte is diploid.