__________ warmed the earth by trapping heat
a. ultra violet rays
b. green house gases
c. infrared rays
d. solar panels
e. polar caskets
B
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H. J. Muller is known for his research on the:
A. relationship between mutations and narcotic drugs B. causes of spontaneous mutation C. relationship between induced mutation and x-rays D. sequencing of genes on the chromosome
Regarding the Original Study, "Whispers from the Ice," which of the following statements best represents the type of work that occurred in Ukkuqsi, near Barrow, Alaska?
a. Archaeologists excavated a prehistoric Inupiat graveyard and were forced to involve official cultural resource managers to help them. b. Paleoanthropologists were asked to join in the excavation because the human remains found at the site were from the Paleozoic era. c. Ethnographers worked with archaeologists and paleontologists as a team to fully excavate and study the wider Barrow region. d. Archaeologists worked with the nearby village elders to better understand what they were excavating.
What is the relationship between ultraviolet radiation, vitamin D, and skin color?
What will be an ideal response?
Cortés was able to quickly and easily defeat the Aztecs, in part because:
A. he pacified the Aztecs by providing them with luxury goods. B. he starved the Aztec armies by cutting off their food supplies. C. he received help from Indian groups that despised the Aztecs. D. his group vastly outnumbered Aztec armies. E. All of the answers are correct.