When T cells interact with an antigen, they differentiate into how many types?
A) 1
B) 2
C) 3
D) 4
C
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The spiral of economic growth and advantage that emerges as external economies, agglomeration and localization economies develop in a place is called
A) cumulative causation. B) creative destruction. C) neo-Fordism. D) flexible production. E) Reaganomics.
What landforms in the Great Lakes–Corn Belt region provide evidence of the major impacts of glaciation in this part of North America?
What will be an ideal response?
What is the term for water that is intermediate in salinity between freshwater and seawater?
A. Connate water B. Brackish water C. Hard water D. Soft water
What type of rock is formed of other rocks that were altered by heat, pressure, or both?
A. regolith B. igneous C. sedimentary D. clastic E. metamorphic