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Unformatted text preview: applied these criteria to the similarly made pebble tools from a number of early sites (before 1.5 million years) at Koobi For a, Kenya, probably made by Homo habilis. At seven sites he found that 57 percent of the flakes were rightoriented, and 43 percent left, a pattern almost identical to that produced today. 10. The word criteria in the passage is closest in meaning to ○ standards
11. What was the purpose of Toth's tool making experiment described in paragraph 6? ○ To shape tools that could be used by either hand
○ To produce replicas of early tools for display in museums
○ To imitate the production of pebble tools from early sites
○ To determine which hand made the early tools
Paragraph 7 在 About 90 percent of modern humans are righthanded: we are the only mammal with a preferential use of one hand. The part of the brain responsible for fine control and movement is located in the left cerebral hemisphere, and the findings above suggest that the human brain was already asymmetrical in its structure and function not long after 2 million years ago. Among Neanderthalers of 70,000 – 35,000 years ago, Marcellin Boule noted that the La ChapelleauxSaints individual had a left hemisphere slightly bigger than the right, and the same was found for brains of specimens from Neanderthal, Gibraltar, and La Quina. 12. What is the author's primary purpose in paragraph 7?
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○ To illustrate the importance of studying the brain ○ To demonstrate that human beings are the only mammal to desire fine control of movement
○ To contrast the functions of the two hemispheres of the brain
○ To demonstrate that righthand preference has existed for a long time
Paragraph 1 在 We all know that many more people today are righthanded than lefthanded. Can one trace this same pattern far back in prehistory? ■Much of the evidence about righthand versus lefthand dominance comes from stencils and prints found in rock shelters in Australia and elsewhere, and in many Ice Age caves in France, Spain, and Tasmania. ■When a left hand has been stenciled, this implies that the artist was righthanded, and vice versa. ■Even though the paint was often sprayed on by mouth, one can assume that the dominant hand assisted in the operation. One also has to make the assumption that hands were stenciled palm downward—a left hand stenciled palm upward might of course look as if it were a right hand. ■Of 158 stencils in the French cave of Gargas, 136 have been identified as left, and only 22 as right; righthandedness was therefore heavily predominant.
13. Look at the four squares [ ■] that indicate where the following sentence could be added to the passage.
The stencils of hands found in these shelters and caves allow us to draw conclusions about which hand was dominant.
Where would the sentence best fit?
14 在 Directions: An introductory sentence for a bri...
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- Fall '13