Which of the following is true of mRNA?
A) It is of fixed size, 750 nucleotides.
B) It is of fixed size, 75 nucleotides.
C) It is of variable size, average of about 750 nucleotides.
D) It is of variable size, average of about 75 nucleotides.
C
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What allocates resources?
A) The economic system of supply and demand B) The amount of easily accessible resources C) The impact of mining operations on an ecosystem D) None of these choices
The population pyramid of a city in southern Florida, Arizona, or even northern Japan may have a visual appearance of ________ because the city's population is dominated by elderly people
A) being "upside down" B) having a wide base C) having perfectly vertical sides D) being an "age-sex ratio" E) being "rightside-up"
The migration transition model predicts that international migration reaches a peak at ________ of the demographic transition
A) stage 1 B) stage 2 C) stage 3 D) stage 4 E) stage 5
The attempt to rebuild a community into a functioning system which may differ from the original condition is known as
A. repair. B. reclamation. C. restoration. D. rehabilitation.