Ecology - Environmental Issues
Q. What is the effect of deforestation on biodiversity? (2019)
A.
Increases biodiversity
B.
No effect on biodiversity
C.
Decreases biodiversity
D.
Enhances ecosystem services
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Solution
Deforestation leads to habitat loss, which significantly decreases biodiversity as many species lose their homes.
Correct Answer: C — Decreases biodiversity
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Q. What is the effect of deforestation on the carbon cycle? (2021)
A.
Increases carbon sequestration
B.
Decreases carbon dioxide levels
C.
Increases carbon dioxide levels
D.
Has no effect
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Solution
Deforestation increases carbon dioxide levels in the atmosphere as trees that absorb CO2 are removed.
Correct Answer: C — Increases carbon dioxide levels
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Q. What is the main effect of deforestation on biodiversity? (2019)
A.
Increase in species diversity
B.
Habitat loss
C.
Improvement in ecosystem services
D.
Reduction in carbon footprint
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Solution
Deforestation leads to habitat loss, which is a major threat to biodiversity.
Correct Answer: B — Habitat loss
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Q. What is the main goal of sustainable development? (2023)
A.
Maximizing resource extraction
B.
Balancing economic growth with environmental protection
C.
Promoting industrialization
D.
Increasing population density
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Solution
Sustainable development aims to meet the needs of the present without compromising the ability of future generations to meet their own needs, balancing economic growth with environmental protection.
Correct Answer: B — Balancing economic growth with environmental protection
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Q. What is the main source of ozone depletion? (2021)
A.
Carbon dioxide
B.
Chlorofluorocarbons (CFCs)
C.
Methane
D.
Nitrous oxide
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Solution
Chlorofluorocarbons (CFCs) are the primary substances responsible for ozone layer depletion.
Correct Answer: B — Chlorofluorocarbons (CFCs)
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Q. What is the main source of ozone layer depletion? (2021)
A.
Carbon dioxide
B.
Chlorofluorocarbons (CFCs)
C.
Methane
D.
Nitrous oxide
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Solution
Chlorofluorocarbons (CFCs) are the primary substances responsible for the depletion of the ozone layer.
Correct Answer: B — Chlorofluorocarbons (CFCs)
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Q. What is the primary effect of deforestation on the environment? (2021)
A.
Increased biodiversity
B.
Soil conservation
C.
Loss of habitat
D.
Improved air quality
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Solution
Deforestation leads to the loss of habitat for many species, contributing to biodiversity loss and ecosystem degradation.
Correct Answer: C — Loss of habitat
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Q. What is the primary goal of sustainable development? (2023)
A.
Maximizing economic growth
B.
Preserving natural resources for future generations
C.
Increasing industrial output
D.
Reducing population growth
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Solution
The primary goal of sustainable development is to meet the needs of the present without compromising the ability of future generations to meet their own needs.
Correct Answer: B — Preserving natural resources for future generations
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Q. What is the primary pollutant in smog? (2021)
A.
Carbon monoxide
B.
Sulfur dioxide
C.
Nitrogen oxides
D.
Particulate matter
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Solution
Particulate matter is a primary pollutant in smog, contributing to air quality issues.
Correct Answer: D — Particulate matter
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Q. What is the term for the gradual increase in Earth's average temperature? (2023)
A.
Climate change
B.
Global warming
C.
Greenhouse effect
D.
Ozone depletion
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Solution
Global warming refers specifically to the gradual increase in Earth's average temperature due to human activities.
Correct Answer: B — Global warming
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Q. What is the term for the gradual increase in the Earth's average temperature? (2023)
A.
Climate change
B.
Global warming
C.
Greenhouse effect
D.
Ozone depletion
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Solution
Global warming refers specifically to the long-term rise in the average temperature of the Earth's atmosphere due to human activities.
Correct Answer: B — Global warming
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Q. What is the term for the loss of biodiversity due to habitat destruction? (2023)
A.
Overexploitation
B.
Pollution
C.
Habitat fragmentation
D.
Extinction
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Solution
Habitat fragmentation leads to the loss of biodiversity as it divides ecosystems and isolates species.
Correct Answer: C — Habitat fragmentation
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Q. Which of the following is a greenhouse gas? (2020)
A.
Oxygen
B.
Nitrogen
C.
Carbon dioxide
D.
Hydrogen
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Solution
Carbon dioxide is a greenhouse gas that contributes to the greenhouse effect and global warming.
Correct Answer: C — Carbon dioxide
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Q. Which of the following is a major contributor to water pollution? (2020)
A.
Plastic waste
B.
Carbon emissions
C.
Soil erosion
D.
Noise pollution
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Solution
Plastic waste is a significant contributor to water pollution, affecting aquatic life and ecosystems.
Correct Answer: A — Plastic waste
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Q. Which of the following practices can help reduce soil erosion? (2022)
A.
Overgrazing
B.
Crop rotation
C.
Deforestation
D.
Urbanization
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Solution
Crop rotation helps maintain soil health and reduces soil erosion by preventing nutrient depletion.
Correct Answer: B — Crop rotation
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