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Questions and Answers
What symbol is used to indicate a connection or relationship?
What symbol is used to indicate a connection or relationship?
What does the arrow '→' suggest?
What does the arrow '→' suggest?
What is the purpose of the '-' symbol?
What is the purpose of the '-' symbol?
What does the '=' symbol represent?
What does the '=' symbol represent?
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What is the theme of the given content?
What is the theme of the given content?
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What is the term 'ewaste' short for?
What is the term 'ewaste' short for?
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What is the concentration of HCB in the Common Tern?
What is the concentration of HCB in the Common Tern?
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Which species has the highest concentration of HCB?
Which species has the highest concentration of HCB?
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What is the source of the information about the HCB concentrations?
What is the source of the information about the HCB concentrations?
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Which species is not mentioned in the content?
Which species is not mentioned in the content?
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What is a common use of PCBs?
What is a common use of PCBs?
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What is the abbreviation of the chemical mentioned in the content?
What is the abbreviation of the chemical mentioned in the content?
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What is a source of unintentionally produced dioxins and furans?
What is a source of unintentionally produced dioxins and furans?
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Which species is mentioned in the content with the concentration of HCB as 500 ug/kg?
Which species is mentioned in the content with the concentration of HCB as 500 ug/kg?
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What is the effect of the chemical mentioned in the content on living organisms?
What is the effect of the chemical mentioned in the content on living organisms?
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What is toxaphene used for?
What is toxaphene used for?
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Which species has a concentration of HCB as 2253/1808 ug/kg?
Which species has a concentration of HCB as 2253/1808 ug/kg?
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Where can PCBs be found as trace contaminants?
Where can PCBs be found as trace contaminants?
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What type of pesticide was used primarily against soil insects and termites?
What type of pesticide was used primarily against soil insects and termites?
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What is a common industrial process that unintentionally produces PCBs?
What is a common industrial process that unintentionally produces PCBs?
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Which of the following pesticides was used to control malaria and typhus?
Which of the following pesticides was used to control malaria and typhus?
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What is a use of PCBs in electrical systems?
What is a use of PCBs in electrical systems?
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What type of pesticide was used for seed treatment and as an industrial chemical?
What type of pesticide was used for seed treatment and as an industrial chemical?
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Which of the following pesticides was used to combat fire ants and termites?
Which of the following pesticides was used to combat fire ants and termites?
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What type of pesticide was used on crops such as corn and cotton?
What type of pesticide was used on crops such as corn and cotton?
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Which of the following pesticides was used to control termites and mealybugs?
Which of the following pesticides was used to control termites and mealybugs?
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What type of pesticide was used on home lawn and garden pests?
What type of pesticide was used on home lawn and garden pests?
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Which of the following pesticides was used to control termites and as a fire retardant?
Which of the following pesticides was used to control termites and as a fire retardant?
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Study Notes
Persistent Organic Pollutants (POPs)
- POPs are a group of toxic substances that persist in the environment for a long time, causing harm to humans and wildlife.
Sources of POPs
- Aldrin and dieldrin: insecticides used on crops such as corn and cotton, and for termite control.
- Chlordane: insecticide used on crops, home lawn and garden pests, and to control termites.
- DDT: insecticide used on agricultural crops, primarily cotton, and to combat diseases such as malaria and typhus.
- Endrin: insecticide used to combat fire ants, termites, and mealybugs, and as a fire retardant in plastics, rubber, and electrical products.
- Heptachlor: insecticide used primarily against soil insects and termites, and to combat malaria.
- Hexachlorobenzene: fungicide used for seed treatment, and as an industrial chemical used to make fireworks, ammunition, synthetic rubber.
- PCBs: used for a variety of industrial processes, including in electrical transformers and capacitors, as heat exchange fluids, as paint additives, in carbonless copy paper, and in plastics.
- Toxaphene: insecticide used to control pests on crops and to kill unwanted fish in lakes.
- Dioxins and furans: unintentionally produced during most forms of combustion, including burning of municipal and medical wastes, backyard burning of trash, and industrial processes.
Effects of POPs
- Bioaccumulation: POPs can accumulate in the fatty tissues of living organisms, including humans, and can be passed on to offspring.
- Biomagnification: POPs can increase in concentration as they move up the food chain, leading to higher levels of toxicity in predators.
Examples of POPs in Wildlife
- Common tern: HCB levels of 3 ug/kg.
- Cape petrel: HCB levels of 2253/1808 ug/kg.
- Adelie penguin: HCB levels of 500 ug/kg.
Studies on POPs
- Van den Brink (1997): study on the effects of POPs on wildlife.
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Description
Test your knowledge of living organisms, their structures, and functions. This quiz covers the basics of biology, including roots and their significance in the ecosystem.
