Energy flow and nutrient cycles MCQs

By: Prof. Dr. Fazal Rehman Shamil | Last updated: September 12, 2024

1. What is the primary source of energy for most ecosystems?
a) Geothermal heat
b) The Sun
c) Wind energy
d) Fossil fuels
Answer: b) The Sun

2. Which process do plants use to convert solar energy into chemical energy?
a) Respiration
b) Transpiration
c) Photosynthesis
d) Decomposition
Answer: c) Photosynthesis

3. In an ecosystem, what percentage of energy is typically transferred from one trophic level to the next?
a) 100%
b) 50%
c) 10%
d) 1%
Answer: c) 10%

4. What is the role of primary consumers in an ecosystem?
a) To break down dead organic matter
b) To consume producers
c) To capture solar energy
d) To eat secondary consumers
Answer: b) To consume producers

5. Which nutrient cycle involves the process of nitrogen fixation?
a) Carbon cycle
b) Nitrogen cycle
c) Phosphorus cycle
d) Water cycle
Answer: b) Nitrogen cycle

6. What is the process by which water vapor returns to Earth’s surface as precipitation?
a) Evaporation
b) Condensation
c) Transpiration
d) Precipitation
Answer: d) Precipitation

7. Which of the following best describes a decomposer’s role in nutrient cycling?
a) Converting carbon dioxide to oxygen
b) Breaking down dead organisms and releasing nutrients back into the soil
c) Producing energy through photosynthesis
d) Consuming primary consumers
Answer: b) Breaking down dead organisms and releasing nutrients back into the soil

8. In the carbon cycle, how is carbon released back into the atmosphere?
a) Through photosynthesis
b) By the respiration of animals and plants
c) By nitrogen fixation
d) Through the absorption by oceans
Answer: b) By the respiration of animals and plants

9. What term describes the continuous movement of water on, above, and below the surface of the Earth?
a) Carbon cycle
b) Hydrologic cycle
c) Nitrogen cycle
d) Phosphorus cycle
Answer: b) Hydrologic cycle

10. In which part of the nutrient cycle do plants absorb nutrients from the soil?
a) Decomposition
b) Photosynthesis
c) Assimilation
d) Nitrogen fixation
Answer: c) Assimilation

 

MCQs on wildlife

1. Wildlife Biology MCQs

2. Ecology MCQs

3. Conservation Biology MCQs

4. Animal Behavior MCQs

5. Population Dynamics MCQs

6. Wildlife Management MCQs

7. Biodiversity MCQs

8. Endangered Species MCQs

9. Habitat Restoration MCQs

10. GIS and Remote Sensing MCQs

11. Wildlife Law and Policy MCQs

12. Zoology MCQs

13. Forestry MCQs

14. Field Research Methods MCQs

15. Wildlife Photography and Documentation MCQs

16. Veterinary Science MCQs

17. Environmental Impact Assessment MCQs

18. Marine Biology MCQs

19. Ornithology MCQs

20. Herpetology MCQs

21. Mammalogy MCQs

22. Entomology MCQs