Your score will decrease with every wrong guess. If you guess wrong 3 times on a question, you will receive no points.
Get every answer correct the first time to score 100%. Good luck!
If you wish to try the quiz again, just click the "reload" button in your browser.
Effects of Bioaccumulation on Ecosystems - Section 2.3 Quiz
When you have completed the quiz, your score will appear here --->
Which of the following statements best describes why amphibians like frogs appear to be very sensitive to environmental change?
Amphibians live in both water and on land, their eggs and skin are both permeable to outside chemicals, and they are sensitive to UV rays from the sun
Amphibians are primary consumers, and absorb chemicals from the aquatic plants they eat
Amphibians have chemicals in their bodies that react with chemicals produced during industrial processes
Amphibians breathe through gills, which exposes them to all of the chemicals that enter the waterways through runoff and leaching
Which of the following would most likely suffer the greatest impact from the biomagnification of harmful chemicals in an ecosystem?
Tertiary consumers
Secondary consumers
Primary consumers
Primary producers
Why is the bioaccumulation of harmful chemicals especially destructive in species such as salmon?
Salmon are a keystone species, meaning they are key in the health of the ecosystems
Salmon are always tertiary consumers, and are at the top of food pyramids
Salmon are an increasingly endangered species
Salmon migrate long distances, allowing them to spread the harmful chemicals into many different ecosystems
PCBs, polychlorinated biphenyls, are synthetic chemicals that are having long-lasting effects on many species, including the orcas of British Columbia.
Why are PCBs still a concern if their use was banned in North America over 30 years ago?
PCBs bioaccumulate in many species and are biomagnified in tertiary consumers like oracs as well
PCBs have a short half-life
PCBs are still used in countries that orcas migrate to during the summer months
PCBs were absorbed by kelp 30 years ago, and now fish that orcas eat are eating the kelp
Which of the following is an example of a POP (persistent organic pollutant)?
DDT
Carbonates
Acid rain
Nitrates
An ecologist discovered that a pesticide was present in the soil of an ecosystem at levels of 8 ppm. The same ecologist noted that lead was also present in the lake water of the same ecosystem as 4 ppm. Which of the following statements is true?
The ecologist measured that there is more pesticide in the ecosystem than there is lead
The ecologist measured that there is more lead in the ecosystem than there is pesticide
The ecologist measured that there is equal amounts of pesticide and lead in the ecosystem
It is impossible to compare the levels of these two pollutants using ppm
Lead is a heavy metal that is also a POP (persistent organic pollutant). Which of the following best describes the effect of lead on humans?
Nervous system damage, reproductive system damage, kidney failure and impaired mental development
Lung cancer, liver and kidney diseases
Nervous system damage, immune system suppression, heart, kidney and lung damage
Hearing and vision loss, elevated blood pressure, memory loss
Smoking introduces hundreds of toxic chemicals into the body. Which heavy metal is found in high amounts in the smoke produced by tobacco plants?
Cadmium
Lead
Mercury
DDT
Many industries are using bioremediation to help reduce the impact of harmful chemicals on ecosystems. Which of the following description best explains bioremediation?
The use of living things to clean up pollutants naturally
The addition of a new species into an ecosystem to eliminate a different, unwanted species
Removing large amounts of contaminated material and replacing it with new, unpolluted material from the same ecosystem
The addition of safe synthetic materials into the ecosystem to clean up pollutants
Which of the following is a source of lead in ecosystems that is still prevalent today?
