midterm - What are the sources of uncertainty in the...

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Name:____________________________________ PESTICIDES, THE ENVIRONMENT AND HUMAN HEALTH Entomology and Toxicology 370 Fall 2006 MIDTERM EXAM 1. (21 points) Briefly define any seven the following terms as they relate to this class (if you do more than seven only the first seven will be graded): a. The Green Revolution b. Food chain c. Trophic level d. Pesticide selectivity e. Synergistic interaction f. Hormesis g. Xenobiotic h. Enzyme induction i. Systemic pesticide 1
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2. (7 points) Congratulations! You caught a 10 lb (4 kg) lake trout! It is contaminated with 310 PPM of DDT. How much DDT would you consume if you ate the whole fish? DDT is a white powder with a molecular weight of 354.5. For full credit you must show all of your calculations! 3. (20 points) You need to teach someone how to determine the acute toxicity of an insecticide to adult Colorado potato beetles. Explain what a bioassay is. How the data plotted? What other manipulations are carried out with the data?
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Unformatted text preview: What are the sources of uncertainty in the estimation of an LD 50 ? The magnitude of the uncertainty is different between the LD 50 and LD 5 . Which has a greater error? 2 4. (8 points) Compare and contrast acute vs. chronic exposure. Do both exposures affect an organism in the same way? 5. (5 points) After a pesticide has come into contact with an organism, what processes does the pesticide undergo that determine if the organism will be poisoned or not? 6. (9 points) List and define three types of pesticide formulations. 7. (10 points) a. List and explain what you consider to be the three most important benefits of pesticides b. List and explain what you consider to be the three most important problems with pesticides c. Based on your answers above, do the benefits outweigh the problems, or do the problems outweigh the benefits? Why? 8. (20 points) Personalized take home question (page 5). Pick it up as you leave. 3...
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This note was uploaded on 10/28/2008 for the course ENTOM 3700 taught by Professor Scott,j.g. during the Fall '06 term at Cornell University (Engineering School).

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midterm - What are the sources of uncertainty in the...

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