How do NK cells and Tc cells kill invading viruses and bacteria?
A) by engulfing and devouring them
B) by injecting a chemical toxin
C) as a result of crenation
D) as a result of lysis
D
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In 2000, two-thirds of all foreign-born individuals lived in just six states. Those six states did NOT include ________
A) California B) New York C) Illinois D) Michigan
The type of plate boundary at which many of the world's major metallic ore deposits are associated is ____________________.
Fill in the blank(s) with the appropriate word(s).
The layer of the Sun that radiates most of the light that reaches Earth is called the ________
A) corona B) photosphere C) ionosphere D) chromosphere E) megasphere
Gifford Pinchot, first head of the U.S. Forest Service, advocated the conservationist view of nature. This view promoted ________
A) a wilderness and ecocentric approach to public resource use B) a biocentric approach to public resources C) resource use in a sustainable manner to provide the greatest benefit for the greatest number of people D) resource use in a sustainable manner with an ecocentric focus E) a deep ecology approach to public resource use