Homo habilis
A) was first discovered by Jonathan Leakey
B) was found near Paranthropus boisei in Bed I at Olduvai Gorge
C) is found in both South and East Africa
D) is dated to around 2.0 to 1.6 million years ago
E) all of the above
E
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Domestication affects the reproduction of plants because
A. domesticated cereals have more brittle axes, allowing seeds to break free from the stalk more easily. B. plant reproduction cannot occur without farming. C. domesticated plants do not produce seeds. D. domesticated plants lose their natural seed dispersal mechanisms. E. domesticated plants reproduce themselves more effectively.
How many major alleles does the ABO blood-type system have?
A. one B. two C. three D. four E. more than four
Which of these specific features allows for the emergence of cities in state-level organizations?
A) high rates of social stratification B) variety of associations C) redistribution of wealth D) intensive agriculture
The principal characteristics of the "culture of poverty," according to Oscar Lewis, are __________
A. malnutrition, high fertility, and poor sanitation B. the absence of fathers and older siblings C. poor access to electricity and running water D. fatalism, apathy, and hopelessness