Most bony fishes have a hard plate that covers the gills on each side of the head called the
A. operculum.
B. pharyngeal slits.
C. lateral lines.
D. gill arches.
E. radula.
Answer: A
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The study of the diagnosis of disease by measuring antibody levels in serum is called:
a. immunology. b. immunohematology. c. serology. d. immunocytology.
See the provided genetic code table. A change in a single base pair could cause which missense mutation?
a. glutamic acid to threonine b. glycine to proline c. threonine to glutamine d. glutamic acid to methionine e. valine to methionine
Four of the five answers listed below are effects of acid rain. Select the exception
a. attacks marble, metals, mortar, and nylons b. causes air inversion and pollution events c. makes toxic heavy metals more mobile d. has different effects in different watersheds e. produces sterile lakes
An organism is discovered that consumes a considerable amount of sugar, yet does not gain much weight when denied air. Curiously, the consumption of sugar increases as air is removed from the organism's environment, but the organism seems to thrive even in the absence of air. When returned to normal air, the organism does fine. Which of the following best describes the organism?
A) It must use a molecule other than oxygen to accept electrons from the electron transport chain. B) It is a normal eukaryotic organism. C) The organism obviously lacks the citric acid cycle and electron transport chain. D) It is an anaerobic organism. E) It is a facultative anaerobe.