11. Legionella and Neisseria are examples of
a. facultative anaerobic gram-negative rods.
b. gram-negative aerobic rods and cocci.
c. spirochetes.
d. anaerobic gram-negative cocci.

12. Staphylococci and streptococci are best classified in the group of
a. gram-positive cocci.
b. gram-negative cocci.
c. gram-negative aerobic rods and cocci.
d. anaerobic gram-negative cocci.

13. Which of the following is a host-dependent bacterium?

a. Mycoplasma
b. Ureaplasma
c. Rickettsia
d. Micrococcus

14. Bacteria that prefer high levels of salt in their growing environment are referred to as
a. calciphiles.
b. halophiles.
c. osmophiles.
d. mesophiles.

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