Environmental Toxicology Of animal MCQs January 8, 2026March 26, 2024 by u930973931_answers 20 min Score: 0 Attempted: 0/20 Subscribe 1. . What is the primary route of exposure to environmental toxins in aquatic animals? (A) Dermal absorption (B) Inhalation (C) Ingestion (D) Injection 2. . Which of the following is not a heavy metal pollutant commonly found in aquatic environments? (A) Lead (B) Mercury (C) Copper (D) Carbon dioxide 3. . What is the term used to describe the accumulation of toxins in organisms at higher trophic levels? (A) Biomagnification (B) Bioaccumulation (C) Biotransformation (D) Biodegradation 4. . Which of the following is a potential effect of pesticide exposure on birds? (A) Increased fertility (B) Enhanced immune function (C) Eggshell thinning (D) Decreased metabolism 5. . What is the primary target organ of dioxin toxicity in animals? (A) Liver (B) Kidneys (C) Heart (D) Brain 6. . Which of the following is a common symptom of lead poisoning in animals? (A) Increased appetite (B) Decreased blood pressure (C) Neurological impairment (D) Enhanced reproductive success 7. . What is the term used to describe the ability of a substance to cause harm to an organism? (A) Toxicity (B) Bioaccumulation (C) Biodiversity (D) Biodegradation 8. . Which of the following is a source of polychlorinated biphenyls (PCBs) in aquatic ecosystems? (A) Volcanic eruptions (B) Industrial discharge (C) Soil erosion (D) Solar radiation 9. . Which of the following is a potential effect of herbicide exposure on amphibians? (A) Increased resistance to disease (B) Deformed limbs (C) Improved reproductive success (D) Enhanced lung capacity 10. . What is the primary route of exposure to air pollutants in terrestrial animals? (A) Dermal absorption (B) Inhalation (C) Ingestion (D) Injection 11. . Which of the following is a common symptom of pesticide poisoning in insects? (A) Increased longevity (B) Enhanced reproduction (C) Neurological impairment (D) Improved immune function 12. . What is the primary target organ of mercury toxicity in marine mammals? (A) Liver (B) Kidneys (C) Brain (D) Heart 13. . Which of the following is a potential effect of plastic pollution on sea turtles? (A) Enhanced shell strength (B) Improved digestion (C) Ingestion of plastic debris (D) Increased buoyancy 14. . What is the term used to describe the breakdown of chemicals into simpler compounds by microorganisms? (A) Biodegradation (B) Bioaccumulation (C) Biomagnification (D) Biotransformation 15. . Which of the following is a common symptom of oil spill exposure in marine birds? (A) Increased buoyancy (B) Enhanced flight performance (C) Feather damage (D) Improved reproductive success 16. . What is the primary target organ of arsenic toxicity in terrestrial animals? (A) Liver (B) Kidneys (C) Lungs (D) Intestines 17. . Which of the following is a source of polycyclic aromatic hydrocarbons (PAHs) in aquatic environments? (A) Agricultural runoff (B) Marine debris (C) Oil spills (D) Urbanization 18. . Which of the following is a potential effect of insecticide exposure on fish? (A) Enhanced gill function (B) Improved swimming ability (C) Impaired reproduction (D) Increased appetite 19. . What is the term used to describe the process of a substance becoming more concentrated in living organisms as it moves through the food chain? (A) Biomagnification (B) Bioaccumulation (C) Biodegradation (D) Biotransformation 20. . Which of the following is a common symptom of heavy metal poisoning in terrestrial animals? (A) Increased bone density (B) Enhanced cognitive function (C) Neurological impairment (D) Improved immune response