Which is incorrect about inflammation?
A. Fever could be beneficial to inhibiting the pathogen.
B. It can last hours to years.
C. Basophils and mast cells release histamine.
D. Serotonin causes smooth muscle contraction.
E. Pyrogens cause vasodilation and increased capillary permeability.
Answer: E
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Which hormone is made by neurosecretory cells in the hypothalamus?
a. antidiuretic hormone (ADH) b. thyroid-stimulating hormone (TSH) c. follicle-stimulating hormone (FSH) d. melatonin e. adrenocorticotropic hormone (ACTH)
DNA polymerase can only add new nucleotides to the 3' DNA end of the template.
Answer the following statement true (T) or false (F)
Which of the following would you expect to be most prevalent in the intestines of humans?
A) Endospore-forming bacilli B) Gram-negative, aerobic cocci C) Facultatively anaerobic gram-negative rods D) Aerobic, helical bacteria E) None of the above
Consider the model for the equilibrium number of species in a mainland (continental) region, as illustrated in Figure 20.23. What does this model say about the rate of speciation?
A) The rate of speciation decreases as a linear function of the number of species. B) The rate of speciation increases as a linear function of the number of species. C) The rate of speciation increases as a function of the number of species, but the rate of increase decelerates as the number of species becomes large.