Dr. Rebecca Lancfield used which of the following in her classification of the Streptococci?
A. The F protein
B. The M-like protein
C. The M protein
D. The haemolytic pattern of the bacteria
E. The C-carbohydrate (moiety) antigen in the cell wall
Answer: E. The C-carbohydrate (moiety) antigen in the cell wall
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Which one of the following incorrectly matches a molluscan structure with its typical function?
A. ctenidia—secretion of the shell (when present) B. visceral mass—houses organs of digestion, excretion, reproduction C. foot—locomotion D. nephrostome—collection of nitrogenous wastes E. radula—feeding organ
All of the following support the idea that RNA may have been the first genetic material EXCEPT?
A. There are viruses that use RNA as genetic material. B. RNA is a simpler molecule than DNA. C. RNA does not mutate. D. RNA has been shown to be able to make copies of itself.
Which event during the evolution of land plants favored the synthesis of secondary compounds?
A) the greenhouse effect throughout the Devonian period B) the reverse-greenhouse effect during the Carboniferous period C) the association of the roots of land plants and fungi D) the rise of herbivory
Which of the following would be observed as a result of vulvovaginal candidiasis?
A) clue cells and a "cottage cheese" discharge B) a "cottage cheese" discharge C) pus-filled lesions and a "cottage cheese" discharge D) pus-filled lesions E) clue cells