Ecotoxicology
Biology ⇒ Ecology and Environment
Ecotoxicology starts at 9 and continues till grade 12.
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See sample questions for grade 10
Describe one way in which ecotoxicology can inform environmental policy.
Describe one way in which ecotoxicology helps protect human health.
Describe one way in which microplastics can enter the food chain.
Describe the role of bioassays in ecotoxicology.
Explain how pesticides can affect non-target organisms in an ecosystem.
A lake receives runoff containing fertilizers, leading to algal blooms. What is the main environmental concern? (1) Increased biodiversity (2) Oxygen depletion (3) Decreased water temperature (4) Reduced sunlight
A pesticide has an LD50 of 10 mg/kg in rats. Is this considered highly toxic? (1) Yes (2) No
A river near a city receives untreated sewage, leading to fish deaths. What is the most likely cause? (1) Increased oxygen (2) Eutrophication (3) Decreased temperature (4) Reduced nutrients
A lake receives runoff containing fertilizers, leading to algal blooms. What is the main environmental concern? (1) Increased biodiversity (2) Oxygen depletion (3) Decreased water temperature (4) Reduced sunlight
A pesticide has an LD50 of 10 mg/kg in rats. Is this considered highly toxic? (1) Yes (2) No
A river near a city receives untreated sewage, leading to fish deaths. What is the most likely cause? (1) Increased oxygen (2) Eutrophication (3) Decreased temperature (4) Reduced nutrients
Which of the following best describes a point source of pollution? (1) Runoff from fields (2) Discharge from a factory pipe (3) Air pollution from cars (4) Littering in parks
Fill in the blank: The ability of an organism to resist the effects of a toxic substance is called __________.
Fill in the blank: The lowest concentration of a substance that causes a detectable effect in organisms is called the __________.
Fill in the blank: The movement of pollutants from soil to groundwater is called __________.
Fill in the blank: The process by which living organisms break down toxic substances is called __________.
True or False: All chemicals that are toxic to humans are also toxic to all other organisms.
True or False: All pollutants are man-made.
True or False: Bioaccumulation refers to the increase in concentration of a toxic substance in an organism over time.
True or False: DDT is a pesticide that has been banned in many countries due to its environmental impact.
