Populations of frog species that hide their eggs beneath rocks or under sand have declined considerably less than have populations of frog species that do not cover their eggs.
3 To improve productivity, manufacturing companies have recently begun restructuring work to produce more goods with fewer assembly-line workers, and the companies have laid off many workers as a consequence. The workers laid off have been those with the least seniority, generally the younger workers.The statements above, if true, most strongly support which of the following as a conclusion?
The products manufactured by the companies are not undergoing design changes while the manufacturing jobs are being restructured.
When assembly-line workers have made sug- gestions for improvements in manufacturing processes, some suggestions have been implemented, but many have not.
Assembly-line workers now need increased reading and mathematical skills to do their jobs.
Some of the innovations in assembly-line processes and procedures that were made to increase productivity have instead proved to be counterproductive.
The manufacturing companies are increasing the average age of their assembly-line workforce while still seeking to increase production.
4.During the nineteenth century, Britain s urban popu- lation increased as its rural population diminished. A historian theorizes that, rather than industrialization s being the cause, this change resulted from a series of migrations to urban areas, each occasioned by a depression in the agrarian economy. To test this hypoth-esis, the historian will compare economic data with population census data. The historian s hypothesis would be most strongly supported if which of the following were found to be
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