Imagine that there were no physiological costs to fever. Should organisms be constantly running an elevated body temperature?
a. Yes, an elevated body temperature would prevent infections.
b. Yes, an elevated body temperature would eliminate the time lag between the spread of infection and fever response.
c. No, most pathogenic bacteria thrive at elevated temperatures.
d. No, infectious organisms would adapt to the new normal body temperature.
D
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Similarity in evolutionarily unrelated groups due to adaptation to similar environments is called
A. concentric evolution. B. convergent evolution. C. biogeographic evolution. D. Hardy-Weinberg equilibrium. E. both biogeographic and convergent evolution.
The single most effective and practical way to prevent the spread of infection among patients is
A. placing patients in negative pressure rooms. B. attentiveness of health care providers and patients to hand washing. C. isolating patients in private rooms. D. wearing gloves, gowns, masks.
Which statement is NOT true?
a. Membranes are often perforated by proteins that extend through both sides of the membrane. b. Some membranes have proteins with channels that allow for the passage of hydrophilic substances. c. Hydrophilic substances have an easier time passing through the lipid bilayer than do hydrophobic substances. d. The current concept of a membrane is best summarized by the fluid mosaic model. e. All of these statements are NOT true
What is the function of the nucleolus?
A. It is the site of protein synthesis. B. It isolates particular chemical activities from the rest of the cell. C. It packages proteins for export from the cell. D. It is the site of ribosome subunit assembly. E. It is the site of photosynthesis.