Homo habilis coexisted with _____ for approximately 200,000 years
A)Homo sapiens
B)Australopithecus sediba
C)Australopithecus robustus
D)Australopithecus afarensis
E)Australopithecus anamensis
D
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Which of the following types of precipitation most likely forms when the surface air temperature is slightly below freezing and the air temperature increases with an increasing distance above the ground?
A. freezing rain B. hail C. rain D. snow
If grass stores 1,000 energy units received from the sun, the ecological efficiency of the ecosystem is 10%, and the trophic levels are grass ? cow ? human, how many units of energy does the human receive of the original 1,000 units?
A. 900 B. 200 C. 100 D. 10 E. 1
If it is 9:00 a.m. in your time zone, two time zones west of you the clock will say
A) 7:00 a.m. B) 11:00 a.m.
The borders of a __________ tend to be highly contested since people often have very personal reasons for perceiving an area a certain way.
A) perceptual regions B) formal regions C) functional regions D) transitional regions E) peripheral regions