Name the immune cell that interacts with and kills an infected "self" cell.
A. macrophage
B. cytotoxic T cell
C. B cell
D. helper T cell
Answer: B. cytotoxic T cell
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Which organism is most likely to be fossilized?
A. earth worm B. clam C. house flies D. jellyfish
Prions are created when normal proteins in the body ____
a. combine with large ribosomal subunit and become infectious b. exchange several long sections of amino acids with other infected proteins c. refold into a different and infectious three-dimensional shape that kills cells in the brain and nervous system d. undergo mutation and create hundreds of copies of themselves e. invade the immune system, causing it to mistakenly destroy the body's healthy tissue
Life history patterns of guppies in Trinidad are a result of which natural selection force?
a. Competition differences in different streams. b. Predation differences in different streams. c. Temperature differences in different streams. d. Pollution differences in different streams. e. Salt concentration differences in different streams.
Which process in the diagram causes the greatest insulin release?
A. A B. B C. C D. A and B equally E. A and C equally F. B and C equally