Which is incorrect about shigellosis?
A. outbreaks have occurred in day care centers
B. it is watery diarrhea with bloody, mucoid stools, and abdominal cramps
C. it frequently involves septicemia
D. human carriers cause fecal transmission
E. it is also called bacillary dysentery
Answer: C. it frequently involves septicemia
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Of the following anatomical structures, which is homologous to the bones in the wing of a bird?
A) cartilage in the dorsal fin of a shark B) bones in the hind limb of a kangaroo C) chitinous struts in the wing of a butterfly D) bony rays in the tail fin of a flying fish E) bones in the flipper of a whale
Imagine that you have two people using breathing gear under water. Diver 1 is using an old style "rebreather" that removes carbon dioxide before the mixture is "rebreathed" and therefore decreases overall carbon dioxide concentrations in the blood. Diver 2 is using regular SCUBA gear and is breathing air with the normal amount of carbon dioxide that does not lower blood levels of carbon dioxide.
Which diver would have a higher blood pH and which would feel more an "urge to breathe"? A. Diver 1 would have higher blood pH and would feel the "urge to breathe" sooner. B. Diver 2 would have higher blood pH and feel the "urge to breathe" sooner. C. Diver 1 would have higher blood pH, while Diver 2 would feel the "urge to breathe" sooner. D. Diver 2 would have higher blood pH, while Diver 1 would feel the "urge to breathe" sooner. E. There would be no difference in blood pH or breathing between the two divers.
A student needs information from the National Institutes of Health, a government agency. Which one of the following endings should he or she look for in the Internet address?
A) edu B) com C) gov D) nih E) org
Climates characteristic of the Mediterranean region are also common in:
a. Nebraska. b. New York. c. Florida. d. Hawaii. e. California