1. What is the primary route of exposure to environmental toxins in aquatic animals?
A) Dermal absorption
B) Inhalation
C) Ingestion
D) Injection
Answer: C) Ingestion
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
Answer: 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
Answer: A) Biomagnification
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
Answer: C) Eggshell thinning
5. What is the primary target organ of dioxin toxicity in animals?
A) Liver
B) Kidneys
C) Heart
D) Brain
Answer: A) Liver
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
Answer: C) Neurological impairment
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
Answer: A) Toxicity
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
Answer: B) Industrial discharge
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
Answer: B) Deformed limbs
10. What is the primary route of exposure to air pollutants in terrestrial animals?
A) Dermal absorption
B) Inhalation
C) Ingestion
D) Injection
Answer: B) Inhalation
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
Answer: C) Neurological impairment
12. What is the primary target organ of mercury toxicity in marine mammals?
A) Liver
B) Kidneys
C) Brain
D) Heart
Answer: C) Brain
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
Answer: C) Ingestion of plastic debris
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
Answer: A) Biodegradation
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
Answer: C) Feather damage
16. What is the primary target organ of arsenic toxicity in terrestrial animals?
A) Liver
B) Kidneys
C) Lungs
D) Intestines
Answer: A) Liver
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
Answer: C) Oil spills
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
Answer: C) Impaired reproduction
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
Answer: A) Biomagnification
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
Answer: C) Neurological impairment