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Page
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Question
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Answer
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Activity/ Subject
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47
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Who is Martin Ouellet?
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47-
48
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Explain the political implications of the deformed frogs.
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This was something that might wake up the public to environmental concerns
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48
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What kinds of things can cause deformities?
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High temps, UV rays; parasites
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UV ray yeast lab
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48
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Research the ozone layer – what it is, what it does, and what is happening to it.
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40
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Explain Ouellet’s work with the Canadian Wildlife Service – why he did it, what he did, and it’s importance.
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-Amphibians were declining
-He set up a controlled experiment to observe frogs in agricultural ponds
-He found deformities in the agg ponds that were not normally in the control ponds
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52
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Explain what is meant by the statement, “The only thing a good scientist can ever prove is that he or she is wrong.”
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The scientific method is set up to test your hypothesis for validity – you can’t prove it right, only wrong.
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Scientific method
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52
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Why is sample size important?
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Too small of samples do not accurately represent a population
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Sample size activity – Math and science
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53
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What is mitosis?
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The process during cell division when the DNA unwinds and replicates itself
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Mitosis activity
Mutations in DNA
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53
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Even though Ouellet’s caged rearing tests did not show any abnormal limbs, what did they show?
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Water in the agricultural ponds could perturb DNA
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54
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What is ectromelia and ectrodactyly?
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Missing legs and missing toes
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56
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What is the advantage and disadvantage of the ‘quasi-police’ status of the Canadian researchers?
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Adv: access to private land w/o permission
Dis: It could be your land!
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Debate
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57
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Explain how a closed cycle of contamination was being created.
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The pesticides were draining or being dumped into the ponds, and used to water the crops
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58
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What made it so hard to pin down one chemical?
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Too many, and they all broke down into new ones, which were not tested for safety
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DDT investigation (bioaccumulatio n) – what happens when pesticides don’t break down in the environment
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