Thwarting each others attempts to reproduce typically

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Unformatted text preview: ness encourages worker bees to hatch honeybee eggs without regard for the relatedness of the young to the "parent". 84 Questions 4 and 5 are based on the following reading F or the following question, consider each of the passage. choices separately and select all that app ly The complications frequently accompanying diabetes, 4. The author provides information that would answer such as impairment of vision and of kidney function, are which of the following questions? now thought to result from the lack of continuous control A □ What is hyperglycemia? B □ What is one cause of hyperglycemia? C □ What are some of the organs that can be of blood glucose concentrations. The healthy pancreas, in response to increases in blood glucose concentration, releases small quantities of insulin throughout the day and thereby maintains the concentration within adversely affected by hyperglycemia? physiological limits (normoglycemia). But the diabetic generally receives only one large dose daily. The diabetic‘s blood glucose concentration can thus fluctuate 5. Select the sentence that shows the cause of radical changes in the diabetic‘s blood glucose concentration. greatly during the interval between doses, and it has been suggested that the complications result from the periods of high concentrations of blood glucose (hyperglycemia). Many investigators thus believe that restoration of normoglycemia might halt the progression of such complications and perhaps even reverse them. 85 Questions 6 to 8 are based on the following reading passage. 6. The passage suggests that it would be easier to The success of fluoride in combating dental decay is calculate fluoride intake from food if well established and, without a doubt, socially beneficial. A ○ adequate diets were available for most people. B ○ individual eating habits were more uniform C ○ the fluoride content of food was more varied However, fluoride's toxic properties have been known for a century. In humans excessive intake (for adults, over 4 milligrams per day) over many years can lead to skeletal D ○ more people were aware of the fluoride content of food E ○ methods for measuring the fluoride content of fluorosis, a well-defined skeletal disorder, and in some plant species, fluoride is more toxic than ozone, sulfur dioxide, or pesticides. food were more generally agreed on Some important questions remain. For example, the precise lower limit at which the fluoride content of bone 7. One function of the second paragraph of the passage is to A ○ raise doubts about fluoride's toxicity B ○ introduce the issue of fluoride's toxicity becomes toxic is still undetermined. And while fluoride intake from water and air can be evaluated relatively easily, it is much harder to estimate how much a given population ingests from foodstuffs because of the wide C ○ variations in individual eating habits and in fluoride differentiate a toxic from a nontoxic amount of fluoride concentrations in foodstuffs....
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This document was uploaded on 09/16/2013.

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