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Chapter 30. Ecotoxicology
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What is the mode by which a chemical enters the lithosphere?
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The bioavailability of contaminants in the hydrosphere is directly related to:
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a. chemical concentration.
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c. water solubility of chemical.
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e. molecular size of chemical.
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All of the following regarding biomarkers are true EXCEPT:
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a. Dermal absorption is considered an external dose.
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b. Biomarkers of susceptibility are useful in extrapolating wildlife disease to human diseases.
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c. Induction of certain enzymes is an important biomarker.
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d. The biologically effective dose is the amount of internal dose needed to elicit a certain response.
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e. The effects of chemical exposure can be different across species.
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Which of the following processes is LEAST likely to be affected by endocrine-disrupting agents?
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Estrogen exposure has been shown to cause all of the following in wildlife species EXCEPT:
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b. altered sex hormone levels.
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d. gonadal malformations.
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Which of the following is FALSE regarding terrestrial ecotoxicology?
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a. Terrestrial organisms are generally exposed to contaminants via ingestion.
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b. Predation is an important confounder of measurements in terrestrial toxicology field studies.
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c. Reproductive tests are not important in measuring end points in toxicity tests.
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d. Enclosure studies are better able to control for environmental factors in field studies.
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e. Toxicity tests usually test the effects of an oral chemical dose.
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An important type(s) of compound that is far more toxic in water than in air is/are:
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