28 Questions
What symbol is used to indicate a connection or relationship?
&
What does the arrow '→' suggest?
Direction
What is the purpose of the '-' symbol?
To separate items
What does the '=' symbol represent?
Equality
What is the theme of the given content?
Environmental issues
What is the term 'ewaste' short for?
Electronic Waste
What is the concentration of HCB in the Common Tern?
3 ug/kg
Which species has the highest concentration of HCB?
Adelie penguin
What is the source of the information about the HCB concentrations?
Van den Brink 1997
Which species is not mentioned in the content?
Lion
What is a common use of PCBs?
As a paint additive
What is the abbreviation of the chemical mentioned in the content?
HCB
What is a source of unintentionally produced dioxins and furans?
All of the above
Which species is mentioned in the content with the concentration of HCB as 500 ug/kg?
Cape petrel
What is the effect of the chemical mentioned in the content on living organisms?
It has a negative effect
What is toxaphene used for?
To control pests and kill unwanted fish
Which species has a concentration of HCB as 2253/1808 ug/kg?
Adelie penguin
Where can PCBs be found as trace contaminants?
In certain herbicides
What type of pesticide was used primarily against soil insects and termites?
Heptachlor
What is a common industrial process that unintentionally produces PCBs?
Industrial processes
Which of the following pesticides was used to control malaria and typhus?
DDT
What is a use of PCBs in electrical systems?
As a component of capacitors
What type of pesticide was used for seed treatment and as an industrial chemical?
Hexachlorobenzene
Which of the following pesticides was used to combat fire ants and termites?
Endrin
What type of pesticide was used on crops such as corn and cotton?
Aldrin
Which of the following pesticides was used to control termites and mealybugs?
Endrin
What type of pesticide was used on home lawn and garden pests?
Chlordane
Which of the following pesticides was used to control termites and as a fire retardant?
Endrin
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.
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.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
