Which type of vaccine was originally used by Pasteur?
A) attenuated vaccine
B) inactivated vaccine
C) subunit vaccine
D) mimic vaccine
A
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Which process transforms the sun's energy into heat, which is then used to produce electricity?
A. green roofs collectors B. photovoltaic fuel transformers C. electric solar converters D. direct solar conversion E. solar thermal systems
The concentration factor of an ore is a measure of its enrichment in a metal of interest, relative to average crustal rock.
Answer the following statement true (T) or false (F)
Looking at Figure 8.5.1, it is evident that no country in Africa is fully democratic
Indicate whether the statement is true or false.
In which of the following climates would vegetation be least likely to develop drought resistant characteristics?
a. low latitude desert b. humid continental, hot summer c. tropical savanna d. Mediterranean