ENVS 149L - Pre-Lab assignment for Toxic Seeds
 please read this week's lab web page and textbook chapter 14-4 and Supplement 17 (Toxicology) before completing this pre-lab quiz

This assignment is due by the start of your lab section

Your Last Name: 

Your e-mail address: 

Question 1 (2 points):

What is the difference between a LD50 and ED50 experiment?

Question 2 (2 points):

 According to table 1 in supplement 17 (dose-response curve) in your textbook, what dose value of fluoride would kill 50% of the population. Now how does that compare to the amount of fluoride the MDC puts in your water.

Question 3 (4 points):

  Use table 1 in Supplement 17 to answer this question -  Joe Blow weights 80 kg and likes to drink a lot of coffee.  A cup of average drip coffee has 100 mg of caffeine (This varies from type of bean to degree of roasting- dark roast actually have less caffeine because the roasting process removes some of the caffeine (http://coffeefaq.com).  What are the minimum and maximum number of cups that Joe would need to drink to reach the LD50 level of toxicity for caffeine?  Show your work.

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Question 4 ( 2 points):

How many seed types and chemical types will you use in your experiment?

Comments:

Use this part to address any problems that you want to be addressed in class, or make any other comments.