Environment and Biodiversity GK MCQ and Quiz (Set 2)

Environment and Biodiversity GK MCQ Quiz for Exam Preparation

Environment and Biodiversity GK MCQ quiz for APSC, SSC, UPSC, and other competitive exams. This quiz features important questions on key topics related to the environment and biodiversity.


What is the primary cause of ocean acidification?

  • A) Oil spills
  • B) Plastic pollution
  • C) Increased carbon dioxide absorption
  • D) Heavy metals

Answer: C) Increased carbon dioxide absorption

Which of the following is a characteristic of biodiversity hotspots?

  • A) High species richness
  • B) High level of endemism
  • C) Threatened habitats
  • D) All of the above

Answer: D) All of the above

What is the main function of the ozone layer?

  • A) To regulate climate
  • B) To absorb harmful UV radiation
  • C) To support photosynthesis
  • D) To maintain atmospheric pressure

Answer: B) To absorb harmful UV radiation

Which ecosystem is known for its high salinity?

  • A) Freshwater lakes
  • B) Coral reefs
  • C) Mangroves
  • D) Estuaries

Answer: C) Mangroves

Which of the following is a benefit of wetlands?

  • A) Water filtration
  • B) Flood mitigation
  • C) Wildlife habitat
  • D) All of the above

Answer: D) All of the above

What is the main cause of the depletion of the ozone layer?

  • A) Carbon dioxide
  • B) Chlorofluorocarbons (CFCs)
  • C) Methane
  • D) Nitrous oxide

Answer: B) Chlorofluorocarbons (CFCs)

Which of the following is a method of sustainable fishing?

  • A) Bycatch reduction
  • B) Bottom trawling
  • C) Overfishing
  • D) Drift net fishing

Answer: A) Bycatch reduction

What is the primary purpose of the Endangered Species Act in the United States?

  • A) To promote agriculture
  • B) To protect endangered species and their habitats
  • C) To regulate hunting
  • D) To manage natural resources

Answer: B) To protect endangered species and their habitats

What percentage of the Earth’s freshwater is stored in glaciers and ice caps?

  • A) 30%
  • B) 60%
  • C) 70%
  • D) 90%

Answer: B) 60%

Which of the following is NOT a greenhouse gas?

  • A) Carbon Dioxide
  • B) Methane
  • C) Oxygen
  • D) Nitrous Oxide

Answer: C) Oxygen

What is the primary role of decomposers in an ecosystem?

  • A) Photosynthesis
  • B) Nutrient recycling
  • C) Predator-prey interactions
  • D) Habitat formation

Answer: B) Nutrient recycling

What is biodiversity loss primarily attributed to?

  • A) Urban development
  • B) Pollution
  • C) Climate change
  • D) All of the above

Answer: D) All of the above

Which of the following ecosystems is characterized by permafrost?

  • A) Desert
  • B) Tundra
  • C) Tropical rainforest
  • D) Grassland

Answer: B) Tundra

What is the main function of a carbon sink?

  • A) To release carbon dioxide
  • B) To absorb and store carbon dioxide
  • C) To produce oxygen
  • D) To filter pollutants

Answer: B) To absorb and store carbon dioxide

Which of the following is a form of renewable energy?

  • A) Coal
  • B) Natural gas
  • C) Wind energy
  • D) Nuclear energy

Answer: C) Wind energy

What is the primary threat to polar bear populations?

  • A) Hunting
  • B) Habitat loss due to climate change
  • C) Pollution
  • D) Disease

Answer: B) Habitat loss due to climate change

Which of the following is a non-renewable resource?

  • A) Biomass
  • B) Solar energy
  • C) Coal
  • D) Wind energy

Answer: C) Coal

What is the main role of the International Union for Conservation of Nature (IUCN)?

  • A) Promote economic development
  • B) Coordinate international environmental policies
  • C) Conserve nature and promote sustainable use of natural resources
  • D) Regulate international trade

Answer: C) Conserve nature and promote sustainable use of natural resources

Which of the following habitats is most threatened by climate change?

  • A) Tropical rainforests
  • B) Tundra
  • C) Coral reefs
  • D) Grasslands

Answer: C) Coral reefs

What is the main purpose of conservation easements?

  • A) To promote agriculture
  • B) To limit development on private lands
  • C) To increase urbanization
  • D) To enhance tourism

Answer: B) To limit development on private lands

Which of the following is a consequence of overfishing?

  • A) Increased fish populations
  • B) Decreased biodiversity
  • C) Healthier marine ecosystems
  • D) Improved fish stocks

Answer: B) Decreased biodiversity

What is the main focus of the Convention on Biological Diversity (CBD)?

  • A) Pollution control
  • B) Climate change mitigation
  • C) Sustainable development and conservation of biodiversity
  • D) Industrial growth

Answer: C) Sustainable development and conservation of biodiversity

Which type of ecosystem is found in coastal areas where freshwater meets saltwater?

  • A) Estuary
  • B) Desert
  • C) Tundra
  • D) Grassland

Answer: A) Estuary

What is the primary goal of reforestation?

  • A) To promote agriculture
  • B) To restore degraded land
  • C) To create urban spaces
  • D) To reduce carbon emissions

Answer: B) To restore degraded land


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