Why is Australopithecus sediba an important fossil in the discussion of human evolution? What will be an ideal response?
Australopithecus sediba is the most likely direct ancestor of modern humans. It includes a
variety of primitive and advanced hominid features. Although A. sediba has a smaller brain size
than modern humans, it has a variety of more advanced features, including a hand that was able
to grip tools effectively.
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A 20-N horizontal force applied to a 10-kg block produces acceleration across a friction-free horizontal surface of
A. 5 m/s2. B. 1 m/s2. C. 2 m/s2. D. 10 m/s2.
Reactions against environmental determinism in the early 20th century gave rise to ________, the view that people use their creativity to decide how to respond to the conditions or constraints of a particular natural environment.
A) political ecology B) cultural ecology C) possibilism D) nature-culture dualism E) cultural landscape
Why does much of the nation drink fluoridated water? What will be an ideal response?
Which of the following was missing from Alfred Wegener's hypothesis?
A) the geometrical fit between South America and Africa B) late Paleozoic glacial features C) paleomagnetic data from ocean crust D) similar fossils on widely separated continents