Man and His Environment is an important chapter of Class 10 Biology that explains the interaction between living organisms and their surroundings. This chapter covers ecosystems, components of environment, food chains and food webs, biogeochemical cycles, pollution, and conservation of natural resources. This post includes Class 10 Biology Chapter 7 MCQs prepared according to the Punjab and Sindh Board syllabus for effective exam preparation.
1. The environment includes:
- A. Only living organisms
- B. Only non-living components
- C. Living and non-living components ✅
- D. Only plants
Explanation: Environment consists of biotic and abiotic components.
2. A community of organisms interacting with their physical environment is called:
- A. Population
- B. Ecosystem ✅
- C. Biosphere
- D. Habitat
Explanation: Ecosystem includes both living organisms and their surroundings.
3. Plants in a food chain are called:
- A. Consumers
- B. Producers ✅
- C. Decomposers
- D. Predators
Explanation: Producers make their own food through photosynthesis.
4. Which organisms break down dead plants and animals?
- A. Producers
- B. Consumers
- C. Decomposers ✅
- D. Herbivores
Explanation: Decomposers recycle nutrients back into the environment.
5. A food web is:
- A. Single food chain
- B. Interconnected food chains ✅
- C. Energy pyramid
- D. Trophic level
Explanation: Food web shows multiple feeding relationships.
6. The transfer of energy from one trophic level to another is:
- A. 100%
- B. 50%
- C. About 10% ✅
- D. About 90%
Explanation: Only about 10% of energy is transferred to next level.
7. Which gas cycle is disturbed by deforestation?
- A. Nitrogen cycle
- B. Carbon cycle ✅
- C. Water cycle
- D. Phosphorus cycle
Explanation: Trees play a major role in carbon dioxide regulation.
8. Which cycle involves evaporation and condensation?
- A. Carbon cycle
- B. Nitrogen cycle
- C. Water cycle ✅
- D. Oxygen cycle
Explanation: Water cycle includes evaporation, condensation, and precipitation.
9. Pollution caused by loud sounds is called:
- A. Air pollution
- B. Water pollution
- C. Noise pollution ✅
- D. Soil pollution
Explanation: Excessive noise harms health and environment.
10. Which pollution is caused by industrial smoke?
- A. Water pollution
- B. Air pollution ✅
- C. Soil pollution
- D. Noise pollution
Explanation: Smoke releases harmful gases into the air.
11. Excess use of fertilizers mainly causes:
- A. Air pollution
- B. Water pollution ✅
- C. Noise pollution
- D. Thermal pollution
Explanation: Fertilizers wash into water bodies.
12. Which of the following is a renewable resource?
- A. Coal
- B. Petroleum
- C. Solar energy ✅
- D. Natural gas
Explanation: Solar energy is naturally replenished.
13. Which resource is non-renewable?
- A. Wind
- B. Coal ✅
- C. Water
- D. Forests
Explanation: Coal takes millions of years to form.
14. Conservation means:
- A. Complete use of resources
- B. Wise use of natural resources ✅
- C. Destroying environment
- D. Industrialization
Explanation: Conservation ensures sustainable use.
15. Which practice helps in conservation of forests?
- A. Deforestation
- B. Reforestation ✅
- C. Mining
- D. Urbanization
Explanation: Reforestation restores forest cover.
16. The variety of life on Earth is called:
- A. Ecosystem
- B. Biodiversity ✅
- C. Population
- D. Community
Explanation: Biodiversity includes all forms of life.
17. Which human activity causes loss of biodiversity?
- A. Plantation
- B. Deforestation ✅
- C. Conservation
- D. Recycling
Explanation: Deforestation destroys habitats.
18. The highest level of ecological organization is:
- A. Population
- B. Community
- C. Biosphere ✅
- D. Ecosystem
Explanation: Biosphere includes all ecosystems on Earth.