Review Test Submission ENYS 1000 Assignment# 5 Quiz

Question 1 Selected Answer: B. Answers: A. B. C. D. E. People in less developed nations are more likely to die of ___________. infectious diseases lifestyle choices infectious diseases cancer heart attacks diabetes Question 2 Selected Answer: E. Answers: A. B. C. D. E. Transport of airborne toxicants like pesticides is a specific problem in agricultural environments. What is this type of airborne pesticide movement called? drift runoff globalization volatilization leaching drift Question 3 Selected Answer: B. Answers: A. B. C. D. E. Chemical X was found to biomagnify in the environment. Below is part of a food chain. In which organism would the highest concentration of chemical X be found? zooplankton → sardines → herring → tuna → dolphin dolphins herring dolphins zooplankton sardines tuna Question 4 Selected Answer: D. Answers: A. What is the current status on the use of microbeads in Canada? They are prohibited for use in the manufacture and sale of cosmetic toiletries. They are permitted in all cosmetics but not in prescription drugs. 1 out of 1 points 1 out of 1 points 1 out of 1 points 1 out of 1 points Results Displayed All Answers, Submitted Answers, Correct Answers Question 1 Selected Answer: B. Answers: A. B. C. D. E. People in less developed nations are more likely to die of ___________. infectious diseases lifestyle choices infectious diseases cancer heart attacks diabetes Question 2 Selected Answer: E. Answers: A. B. C. D. E. Transport of airborne toxicants like pesticides is a specific problem in agricultural environments. What is this type of airborne pesticide movement called? drift runoff globalization volatilization leaching drift Question 3 Selected Answer: B. Answers: A. B. C. D. E. Chemical X was found to biomagnify in the environment. Below is part of a food chain. In which organism would the highest concentration of chemical X be found? zooplankton → sardines → herring → tuna → dolphin dolphins herring dolphins zooplankton sardines tuna Question 4 Selected Answer: D. Answers: A. What is the current status on the use of microbeads in Canada? They are prohibited for use in the manufacture and sale of cosmetic toiletries. They are permitted in all cosmetics but not in prescription drugs. 1 out of 1 points 1 out of 1 points 1 out of 1 points 1 out of 1 points Results Displayed All Answers, Submitted Answers, Correct Answers Question 1 Selected Answer: B. Answers: A. B. C. D. E. People in less developed nations are more likely to die of ___________. infectious diseases lifestyle choices infectious diseases cancer heart attacks diabetes Question 2 Selected Answer: E. Answers: A. B. C. D. E. Transport of airborne toxicants like pesticides is a specific problem in agricultural environments. What is this type of airborne pesticide movement called? drift runoff globalization volatilization leaching drift Question 3 Selected Answer: B. Answers: A. B. C. D. E. Chemical X was found to biomagnify in the environment. Below is part of a food chain. In which organism would the highest concentration of chemical X be found? zooplankton → sardines → herring → tuna → dolphin dolphins herring dolphins zooplankton sardines tuna Question 4 Selected Answer: D. Answers: A. What is the current status on the use of microbeads in Canada? They are prohibited for use in the manufacture and sale of cosmetic toiletries. They are permitted in all cosmetics but not in prescription drugs. 1 out of 1 points 1 out of 1 points 1 out of 1 points 1 out of 1 points Results Displayed All Answers, Submitted Answers, Correct Answers Question 1 Selected Answer: B. Answers: A. B. C. D. E. People in less developed nations are more likely to die of ___________. infectious diseases lifestyle choices infectious diseases cancer heart attacks diabetes Question 2 Selected Answer: E. Answers: A. B. C. D. E. Transport of airborne toxicants like pesticides is a specific problem in agricultural environments. What is this type of airborne pesticide movement called? drift runoff globalization volatilization leaching drift Question 3 Selected Answer: B. Answers: A. B. C. D. E. Chemical X was found to biomagnify in the environment. Below is part of a food chain. In which organism would the highest concentration of chemical X be found? zooplankton → sardines → herring → tuna → dolphin dolphins herring dolphins zooplankton sardines tuna Question 4 Selected Answer: D. Answers: A. What is the current status on the use of microbeads in Canada? They are prohibited for use in the manufacture and sale of cosmetic toiletries. They are permitted in all cosmetics but not in prescription drugs. 1 out of 1 points 1 out of 1 points 1 out of 1 points 1 out of 1 points Results Displayed All Answers, Submitted Answers, Correct Answers Question 1 Selected Answer: B. Answers: A. B. C. D. E. People in less developed nations are more likely to die of ___________. infectious diseases lifestyle choices infectious diseases cancer heart attacks diabetes Question 2 Selected Answer: E. Answers: A. B. C. D. E. Transport of airborne toxicants like pesticides is a specific problem in agricultural environments. What is this type of airborne pesticide movement called? drift runoff globalization volatilization leaching drift Question 3 Selected Answer: B. Answers: A. B. C. D. E. Chemical X was found to biomagnify in the environment. Below is part of a food chain. In which organism would the highest concentration of chemical X be found? zooplankton → sardines → herring → tuna → dolphin dolphins herring dolphins zooplankton sardines tuna Question 4 Selected Answer: D. Answers: A. What is the current status on the use of microbeads in Canada? They are prohibited for use in the manufacture and sale of cosmetic toiletries. They are permitted in all cosmetics but not in prescription drugs. 1 out of 1 points 1 out of 1 points 1 out of 1 points 1 out of 1 points Results Displayed All Answers, Submitted Answers, Correct Answers Question 1 Selected Answer: B. Answers: A. B. C. D. E. People in less developed nations are more likely to die of ___________. infectious diseases lifestyle choices infectious diseases cancer heart attacks diabetes Question 2 Selected Answer: E. Answers: A. B. C. D. E. Transport of airborne toxicants like pesticides is a specific problem in agricultural environments. What is this type of airborne pesticide movement called? drift runoff globalization volatilization leaching drift Question 3 Selected Answer: B. Answers: A. B. C. D. E. Chemical X was found to biomagnify in the environment. Below is part of a food chain. In which organism would the highest concentration of chemical X be found? zooplankton → sardines → herring → tuna → dolphin dolphins herring dolphins zooplankton sardines tuna Question 4 Selected Answer: D. Answers: A. What is the current status on the use of microbeads in Canada? They are prohibited for use in the manufacture and sale of cosmetic toiletries. They are permitted in all cosmetics but not in prescription drugs. 1 out of 1 points 1 out of 1 points 1 out of 1 points 1 out of 1 points B. C. D. E. They are still being studied and a decision will be made in 2020. They are considered safe ingredients in cosmetics such as shampoos. They are prohibited for use in the manufacture and sale of cosmetic toiletries. All of the above statements about microbeads are true. Question 5 Selected Answer: A. Answers: A. B. C. D. E. Studies of endocrine disruptors have shown that they are closely associated with all of the following except lung cancer lung cancer thyroid abnormalities male feminization fertility problems lower birth rates Question 6 Selected Answer: D. Answers: A. B. C. D. E. From the information on perceived risks provided in the Powerpoint slides for this assignment, list the following hazards according to the risk they pose (with the most risky listed first). automobile accident, homicide, drowning, airplane accident automobile accident, airplane accident, homicide, drowning automobile accident, homicide, airplane accident, drowning airplane accident, automobile accident, homicide, drowning automobile accident, homicide, drowning, airplane accident homicide, automobile accident, drowning, airplane accident Question 7 Selected Answer: A. Answers: A. B. C. D. E. What is a zoonotic disease? diseases that can spread between infected animals and humans diseases that can spread between infected animals and humans diseases that are new emerging infectious disease resulting from genetic modification diseases that can spread between one infected animal to another, but cannot be spread to humans diseases that occur in zoos and other artificial environments diseases that are caused by environmental changes that are due to human activities Question 8 Selected Answer: A. The probability that harmful effects will occur is determined after a careful cost and benefit analysis. What is this process called? a risk assessment 1 out of 1 points 1 out of 1 points 1 out of 1 points 1 out of 1 points B. C. D. E. They are still being studied and a decision will be made in 2020. They are considered safe ingredients in cosmetics such as shampoos. They are prohibited for use in the manufacture and sale of cosmetic toiletries. All of the above statements about microbeads are true. Question 5 Selected Answer: A. Answers: A. B. C. D. E. Studies of endocrine disruptors have shown that they are closely associated with all of the following except lung cancer lung cancer thyroid abnormalities male feminization fertility problems lower birth rates Question 6 Selected Answer: D. Answers: A. B. C. D. E. From the information on perceived risks provided in the Powerpoint slides for this assignment, list the following hazards according to the risk they pose (with the most risky listed first). automobile accident, homicide, drowning, airplane accident automobile accident, airplane accident, homicide, drowning automobile accident, homicide, airplane accident, drowning airplane accident, automobile accident, homicide, drowning automobile accident, homicide, drowning, airplane accident homicide, automobile accident, drowning, airplane accident Question 7 Selected Answer: A. Answers: A. B. C. D. E. What is a zoonotic disease? diseases that can spread between infected animals and humans diseases that can spread between infected animals and humans diseases that are new emerging infectious disease resulting from genetic modification diseases that can spread between one infected animal to another, but cannot be spread to humans diseases that occur in zoos and other artificial environments diseases that are caused by environmental changes that are due to human activities Question 8 Selected Answer: A. The probability that harmful effects will occur is determined after a careful cost and benefit analysis. What is this process called? a risk assessment 1 out of 1 points 1 out of 1 points 1 out of 1 points 1 out of 1 points B. C. D. E. They are still being studied and a decision will be made in 2020. They are considered safe ingredients in cosmetics such as shampoos. They are prohibited for use in the manufacture and sale of cosmetic toiletries. All of the above statements about microbeads are true. Question 5 Selected Answer: A. Answers: A. B. C. D. E. Studies of endocrine disruptors have shown that they are closely associated with all of the following except lung cancer lung cancer thyroid abnormalities male feminization fertility problems lower birth rates Question 6 Selected Answer: D. Answers: A. B. C. D. E. From the information on perceived risks provided in the Powerpoint slides for this assignment, list the following hazards according to the risk they pose (with the most risky listed first). automobile accident, homicide, drowning, airplane accident automobile accident, airplane accident, homicide, drowning automobile accident, homicide, airplane accident, drowning airplane accident, automobile accident, homicide, drowning automobile accident, homicide, drowning, airplane accident homicide, automobile accident, drowning, airplane accident Question 7 Selected Answer: A. Answers: A. B. C. D. E. What is a zoonotic disease? diseases that can spread between infected animals and humans diseases that can spread between infected animals and humans diseases that are new emerging infectious disease resulting from genetic modification diseases that can spread between one infected animal to another, but cannot be spread to humans diseases that occur in zoos and other artificial environments diseases that are caused by environmental changes that are due to human activities Question 8 Selected Answer: A. The probability that harmful effects will occur is determined after a careful cost and benefit analysis. What is this process called? a risk assessment 1 out of 1 points 1 out of 1 points 1 out of 1 points 1 out of 1 points B. C. D. E. They are still being studied and a decision will be made in 2020. They are considered safe ingredients in cosmetics such as shampoos. They are prohibited for use in the manufacture and sale of cosmetic toiletries. All of the above statements about microbeads are true. Question 5 Selected Answer: A. Answers: A. B. C. D. E. Studies of endocrine disruptors have shown that they are closely associated with all of the following except lung cancer lung cancer thyroid abnormalities male feminization fertility problems lower birth rates Question 6 Selected Answer: D. Answers: A. B. C. D. E. From the information on perceived risks provided in the Powerpoint slides for this assignment, list the following hazards according to the risk they pose (with the most risky listed first). automobile accident, homicide, drowning, airplane accident automobile accident, airplane accident, homicide, drowning automobile accident, homicide, airplane accident, drowning airplane accident, automobile accident, homicide, drowning automobile accident, homicide, drowning, airplane accident homicide, automobile accident, drowning, airplane accident Question 7 Selected Answer: A. Answers: A. B. C. D. E. What is a zoonotic disease? diseases that can spread between infected animals and humans diseases that can spread between infected animals and humans diseases that are new emerging infectious disease resulting from genetic modification diseases that can spread between one infected animal to another, but cannot be spread to humans diseases that occur in zoos and other artificial environments diseases that are caused by environmental changes that are due to human activities Question 8 Selected Answer: A. The probability that harmful effects will occur is determined after a careful cost and benefit analysis. What is this process called? a risk assessment 1 out of 1 points 1 out of 1 points 1 out of 1 points 1 out of 1 points B. C. D. E. They are still being studied and a decision will be made in 2020. They are considered safe ingredients in cosmetics such as shampoos. They are prohibited for use in the manufacture and sale of cosmetic toiletries. All of the above statements about microbeads are true. Question 5 Selected Answer: A. Answers: A. B. C. D. E. Studies of endocrine disruptors have shown that they are closely associated with all of the following except lung cancer lung cancer thyroid abnormalities male feminization fertility problems lower birth rates Question 6 Selected Answer: D. Answers: A. B. C. D. E. From the information on perceived risks provided in the Powerpoint slides for this assignment, list the following hazards according to the risk they pose (with the most risky listed first). automobile accident, homicide, drowning, airplane accident automobile accident, airplane accident, homicide, drowning automobile accident, homicide, airplane accident, drowning airplane accident, automobile accident, homicide, drowning automobile accident, homicide, drowning, airplane accident homicide, automobile accident, drowning, airplane accident Question 7 Selected Answer: A. Answers: A. B. C. D. E. What is a zoonotic disease? diseases that can spread between infected animals and humans diseases that can spread between infected animals and humans diseases that are new emerging infectious disease resulting from genetic modification diseases that can spread between one infected animal to another, but cannot be spread to humans diseases that occur in zoos and other artificial environments diseases that are caused by environmental changes that are due to human activities Question 8 Selected Answer: A. The probability that harmful effects will occur is determined after a careful cost and benefit analysis. What is this process called? a risk assessment 1 out of 1 points 1 out of 1 points 1 out of 1 points 1 out of 1 points B. C. D. E. They are still being studied and a decision will be made in 2020. They are considered safe ingredients in cosmetics such as shampoos. They are prohibited for use in the manufacture and sale of cosmetic toiletries. All of the above statements about microbeads are true. Question 5 Selected Answer: A. Answers: A. B. C. D. E. Studies of endocrine disruptors have shown that they are closely associated with all of the following except lung cancer lung cancer thyroid abnormalities male feminization fertility problems lower birth rates Question 6 Selected Answer: D. Answers: A. B. C. D. E. From the information on perceived risks provided in the Powerpoint slides for this assignment, list the following hazards according to the risk they pose (with the most risky listed first). automobile accident, homicide, drowning, airplane accident automobile accident, airplane accident, homicide, drowning automobile accident, homicide, airplane accident, drowning airplane accident, automobile accident, homicide, drowning automobile accident, homicide, drowning, airplane accident homicide, automobile accident, drowning, airplane accident Question 7 Selected Answer: A. Answers: A. B. C. D. E. What is a zoonotic disease? diseases that can spread between infected animals and humans diseases that can spread between infected animals and humans diseases that are new emerging infectious disease resulting from genetic modification diseases that can spread between one infected animal to another, but cannot be spread to humans diseases that occur in zoos and other artificial environments diseases that are caused by environmental changes that are due to human activities Question 8 Selected Answer: A. The probability that harmful effects will occur is determined after a careful cost and benefit analysis. What is this process called? a risk assessment 1 out of 1 points 1 out of 1 points 1 out of 1 points 1 out of 1 points Answers: A. B. C. D. E. a risk assessment a risk perception evaluation a hazard analysis a manipulative experiment a toxicity test Question 9 Selected Answer: D. Answers: A. B. C. D. E. What type of chemical is Bisphenol-A (BPA)? It is an estrogen mimic that is used in plastic manufacturing. It is a banned insecticide due to its biomagnification in food webs. It is a chemical propellant released from aerosol spray cans. It is a major product formed when fossil fuels are burned. It is an estrogen mimic that is used in plastic manufacturing. It is a commonly used herbicide for killing agricultural weeds. Question 10 Selected Answer: C. Answers: A. B. C. D. E. The lead found in the water in Flint, Michigan, is what type of toxic chemical? neurotoxin carcinogen irritant neurotoxin endocrine disruptor teratogen Question 11 Selected Answer: C. Answers: A. B. C. D. E. Concentration of DDT (expressed as parts per million or ppm) are 0.04 ppm in microscopic plankton, 0.5 ppm in small fish (e.g. minnows), 2 ppm in large fish (e.g. trout), and 25 ppm in a predatory bird (e.g. osprey). which statement is true about this pattern? It suggests that the pesticide is biomagnified through the trophic pyramid. It should not be too alarming, because even the highest numbers are still too low to cause significant damage (at most they are 25 ppm) in a biological community. It shows that because the higher concentrations are in larger animals, so DDT content per kilogram of biomass does not increase as much as these numbers would suggest. It suggests that the pesticide is biomagnified through the trophic pyramid. It is an example of a synergistic effect. It suggests that the numbers of ospreys will decline, which would restore healthy ecosystem functioning. 1 out of 1 points 1 out of 1 points 1 out of 1 points Answers: A. B. C. D. E. a risk assessment a risk perception evaluation a hazard analysis a manipulative experiment a toxicity test Question 9 Selected Answer: D. Answers: A. B. C. D. E. What type of chemical is Bisphenol-A (BPA)? It is an estrogen mimic that is used in plastic manufacturing. It is a banned insecticide due to its biomagnification in food webs. It is a chemical propellant released from aerosol spray cans. It is a major product formed when fossil fuels are burned. It is an estrogen mimic that is used in plastic manufacturing. It is a commonly used herbicide for killing agricultural weeds. Question 10 Selected Answer: C. Answers: A. B. C. D. E. The lead found in the water in Flint, Michigan, is what type of toxic chemical? neurotoxin carcinogen irritant neurotoxin endocrine disruptor teratogen Question 11 Selected Answer: C. Answers: A. B. C. D. E. Concentration of DDT (expressed as parts per million or ppm) are 0.04 ppm in microscopic plankton, 0.5 ppm in small fish (e.g. minnows), 2 ppm in large fish (e.g. trout), and 25 ppm in a predatory bird (e.g. osprey). which statement is true about this pattern? It suggests that the pesticide is biomagnified through the trophic pyramid. It should not be too alarming, because even the highest numbers are still too low to cause significant damage (at most they are 25 ppm) in a biological community. It shows that because the higher concentrations are in larger animals, so DDT content per kilogram of biomass does not increase as much as these numbers would suggest. It suggests that the pesticide is biomagnified through the trophic pyramid. It is an example of a synergistic effect. It suggests that the numbers of ospreys will decline, which would restore healthy ecosystem functioning. 1 out of 1 points 1 out of 1 points 1 out of 1 points Answers: A. B. C. D. E. a risk assessment a risk perception evaluation a hazard analysis a manipulative experiment a toxicity test Question 9 Selected Answer: D. Answers: A. B. C. D. E. What type of chemical is Bisphenol-A (BPA)? It is an estrogen mimic that is used in plastic manufacturing. It is a banned insecticide due to its biomagnification in food webs. It is a chemical propellant released from aerosol spray cans. It is a major product formed when fossil fuels are burned. It is an estrogen mimic that is used in plastic manufacturing. It is a commonly used herbicide for killing agricultural weeds. Question 10 Selected Answer: C. Answers: A. B. C. D. E. The lead found in the water in Flint, Michigan, is what type of toxic chemical? neurotoxin carcinogen irritant neurotoxin endocrine disruptor teratogen Question 11 Selected Answer: C. Answers: A. B. C. D. E. Concentration of DDT (expressed as parts per million or ppm) are 0.04 ppm in microscopic plankton, 0.5 ppm in small fish (e.g. minnows), 2 ppm in large fish (e.g. trout), and 25 ppm in a predatory bird (e.g. osprey). which statement is true about this pattern? It suggests that the pesticide is biomagnified through the trophic pyramid. It should not be too alarming, because even the highest numbers are still too low to cause significant damage (at most they are 25 ppm) in a biological community. It shows that because the higher concentrations are in larger animals, so DDT content per kilogram of biomass does not increase as much as these numbers would suggest. It suggests that the pesticide is biomagnified through the trophic pyramid. It is an example of a synergistic effect. It suggests that the numbers of ospreys will decline, which would restore healthy ecosystem functioning. 1 out of 1 points 1 out of 1 points 1 out of 1 points Answers: A. B. C. D. E. a risk assessment a risk perception evaluation a hazard analysis a manipulative experiment a toxicity test Question 9 Selected Answer: D. Answers: A. B. C. D. E. What type of chemical is Bisphenol-A (BPA)? It is an estrogen mimic that is used in plastic manufacturing. It is a banned insecticide due to its biomagnification in food webs. It is a chemical propellant released from aerosol spray cans. It is a major product formed when fossil fuels are burned. It is an estrogen mimic that is used in plastic manufacturing. It is a commonly used herbicide for killing agricultural weeds. Question 10 Selected Answer: C. Answers: A. B. C. D. E. The lead found in the water in Flint, Michigan, is what type of toxic chemical? neurotoxin carcinogen irritant neurotoxin endocrine disruptor teratogen Question 11 Selected Answer: C. Answers: A. B. C. D. E. Concentration of DDT (expressed as parts per million or ppm) are 0.04 ppm in microscopic plankton, 0.5 ppm in small fish (e.g. minnows), 2 ppm in large fish (e.g. trout), and 25 ppm in a predatory bird (e.g. osprey). which statement is true about this pattern? It suggests that the pesticide is biomagnified through the trophic pyramid. It should not be too alarming, because even the highest numbers are still too low to cause significant damage (at most they are 25 ppm) in a biological community. It shows that because the higher concentrations are in larger animals, so DDT content per kilogram of biomass does not increase as much as these numbers would suggest. It suggests that the pesticide is biomagnified through the trophic pyramid. It is an example of a synergistic effect. It suggests that the numbers of ospreys will decline, which would restore healthy ecosystem functioning. 1 out of 1 points 1 out of 1 points 1 out of 1 points Answers: A. B. C. D. E. a risk assessment a risk perception evaluation a hazard analysis a manipulative experiment a toxicity test Question 9 Selected Answer: D. Answers: A. B. C. D. E. What type of chemical is Bisphenol-A (BPA)? It is an estrogen mimic that is used in plastic manufacturing. It is a banned insecticide due to its biomagnification in food webs. It is a chemical propellant released from aerosol spray cans. It is a major product formed when fossil fuels are burned. It is an estrogen mimic that is used in plastic manufacturing. It is a commonly used herbicide for killing agricultural weeds. Question 10 Selected Answer: C. Answers: A. B. C. D. E. The lead found in the water in Flint, Michigan, is what type of toxic chemical? neurotoxin carcinogen irritant neurotoxin endocrine disruptor teratogen Question 11 Selected Answer: C. Answers: A. B. C. D. E. Concentration of DDT (expressed as parts per million or ppm) are 0.04 ppm in microscopic plankton, 0.5 ppm in small fish (e.g. minnows), 2 ppm in large fish (e.g. trout), and 25 ppm in a predatory bird (e.g. osprey). which statement is true about this pattern? It suggests that the pesticide is biomagnified through the trophic pyramid. It should not be too alarming, because even the highest numbers are still too low to cause significant damage (at most they are 25 ppm) in a biological community. It shows that because the higher concentrations are in larger animals, so DDT content per kilogram of biomass does not increase as much as these numbers would suggest. It suggests that the pesticide is biomagnified through the trophic pyramid. It is an example of a synergistic effect. It suggests that the numbers of ospreys will decline, which would restore healthy ecosystem functioning. 1 out of 1 points 1 out of 1 points 1 out of 1 points Answers: A. B. C. D. E. a risk assessment a risk perception evaluation a hazard analysis a manipulative experiment a toxicity test Question 9 Selected Answer: D. Answers: A. B. C. D. E. What type of chemical is Bisphenol-A (BPA)? It is an estrogen mimic that is used in plastic manufacturing. It is a banned insecticide due to its biomagnification in food webs. It is a chemical propellant released from aerosol spray cans. It is a major product formed when fossil fuels are burned. It is an estrogen mimic that is used in plastic manufacturing. It is a commonly used herbicide for killing agricultural weeds. Question 10 Selected Answer: C. Answers: A. B. C. D. E. The lead found in the water in Flint, Michigan, is what type of toxic chemical? neurotoxin carcinogen irritant neurotoxin endocrine disruptor teratogen Question 11 Selected Answer: C. Answers: A. B. C. D. E. Concentration of DDT (expressed as parts per million or ppm) are 0.04 ppm in microscopic plankton, 0.5 ppm in small fish (e.g. minnows), 2 ppm in large fish (e.g. trout), and 25 ppm in a predatory bird (e.g. osprey). which statement is true about this pattern? It suggests that the pesticide is biomagnified through the trophic pyramid. It should not be too alarming, because even the highest numbers are still too low to cause significant damage (at most they are 25 ppm) in a biological community. It shows that because the higher concentrations are in larger animals, so DDT content per kilogram of biomass does not increase as much as these numbers would suggest. It suggests that the pesticide is biomagnified through the trophic pyramid. It is an example of a synergistic effect. It suggests that the numbers of ospreys will decline, which would restore healthy ecosystem functioning. 1 out of 1 points 1 out of 1 points 1 out of 1 points Question 12 Selected Answer: E. Answers: A. B. C. D. E. What is true of the effect of toxicants on embryos and fetuses? It is greater than the effect on adults because of the fetuses' rapid growth and smaller biomass. It is less than the effect on adults because the fetuses' metabolisms are higher. It has been systematically evaluated for most chemicals released into both indoor and outdoor environments. It is less than the effect on adults because the fetuses are protected by their mothers' immune systems. It can be estimated from the known effects in adults, after correction for the difference in weight. It is greater than the effect on adults because of the fetuses' rapid growth and smaller biomass. Question 13 Selected Answer: A. Answers: A. B. C. D. E. From the Powerpoint slides for this assignment, what has the experience with PBDE's shown? That the removal of PBDE from the environment reduces its concentrations in human bodies That the removal of PBDE from the environment reduces its concentrations in human bodies That the fire safety benefits of PBDE outweigh any health concerns of these chemicals That these molecules can be rapidly metabolized in human bodies so there are no long-term health concerns That these chemicals are the most effective fire retardants and can be used in a wide variety of products without environmental or human health impacts That these compounds are preferable to other fire retardants because they show reduced risks of nervous system developmental damage in young children Question 14 Selected Answer: D. Answers: A. B. C. D. E. Canada's approach to chemicals is to assume they are toxic until they are shown to be harmless. What is this approach called? precautionary principle approach let-the-industry-regulate-itself approach innocent-until-proven-toxic approach the buyer-beware approach precautionary principle approach the non-existent approach