Dendritic cells transport protein fragments of invading viruses or bacteria to which of the following?
A) an MHC
B) Th cells
C) both a and b
D) neither a nor b
B
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The cleanup of toxic wastes at orphan or abandoned sites, without responsible parties, is largely addressed by
A) local governments. B) state governments. C) money raised from gasoline taxes and pollution fines. D) federal superfund money.
The bob at the end of a vertical spring vibrates up and down once every 2 s. Its frequency is
A. 2 Hz. B. more than 2 Hz. C. 0.5 Hz. D. none of the above
In the creation of cultural landscapes, culture is
A) dynamic and evolves with changing landscapes. B) "superorganic" and determines unique landscapes. C) static and fixes historic landscapes. D) determined by the landscape. E) fictional and receives meaning from the books, films and music written about it.
What is the reference level to which a tidal height is compared to?
a. Datum b. Amphidromic point c. Tidal range d. Bore point