The chemokine CCL2
A) attracts basophils, eosinophils, monocytes, and dendritic cells.
B) stimulates production of inflammatory mediators.
C) organizes an antigen specific immune response.
D) attracts basophils, eosinophils, monocytes, and dendritic cells; stimulates production of inflammatory mediators; and organizes an antigen specific immune response.
Answer: D
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Which of the following are qualities of any good scientific hypothesis? I. It is testable. II. It is falsifiable. III. It produces quantitative data. IV. It produces results that can be replicated
A) I only B) II only C) III only D) I and II E) III and IV
If two species of lizards do not mate because their mating rituals differ greatly, this is known as
a. behavioral isolation. b. ecological isolation. c. gametic isolation. d. mechanical isolation. e. temporal isolation.
During his trip on the Beagle, Darwin found that ________.
A. plants and animals living in temperate regions were most similar to each other, regardless of the continent on which they were found B. plants and animals were similar on every continent and in every type of region C. fossils found on a particular continent were clearly not related to the plants and animals living on that continent today D. plants and animals living on a continent seemed more closely related to each other than to plants and animals living in similar regions on other continents
Why might broad spectrum antimicrobials be initially used when treating a patient?
A) It's best to start with broad spectrum antimicrobials until patient records are available that show if the patient has any antimicrobial allergies. B) The physician has never encountered that pathogen before. C) They may initially be used to protect the patient since it can take several days to make a definitive bacterial identification. D) They are cheaper to use. E) An initial round of broad spectrum antimicrobials increases the efficiency of narrow spectrum antimicrobials.