MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What does this statement “The energy passed from producers to consumers (herbivores) does not go back to producers (autotrophs)” states about the flow of energy? |
| A. | Flow is unidirectional |
| B. | Flow has no specific direction |
| C. | Flow is bidirectional |
| D. | Flow is multidirectional |
| Answer» B. Flow has no specific direction | |
| 2. |
What amount of sunlight is held the ozone layer, water vapor, and atmospheric gases out of total sunlight reaching Earth? |
| A. | 50% |
| B. | 8% |
| C. | 20% |
| D. | 10% |
| Answer» E. | |
| 3. |
How much percent of light reaches the Earth’s surface out of the total sunlight? |
| A. | 20% |
| B. | 56% |
| C. | 0.1% |
| D. | 30% |
| Answer» C. 0.1% | |
| 4. |
How sunlight is much is reflected back out of the total sunlight reaching Earth? |
| A. | 100% |
| B. | 50% |
| C. | 34% |
| D. | 10% |
| Answer» D. 10% | |
| 5. |
Who are the major producers in an aquatic ecosystem? |
| A. | Zooplankton |
| B. | Phytoplankton |
| C. | Fungi |
| D. | Bacteria |
| Answer» C. Fungi | |
| 6. |
Who are the major producers in a terrestrial ecosystem? |
| A. | Phytoplankton |
| B. | Zooplankton |
| C. | Green plants |
| D. | Birds |
| Answer» D. Birds | |
| 7. |
What are the green plants in the ecosystem termed as? |
| A. | Scavengers |
| B. | Consumers |
| C. | Decomposers |
| D. | Producers |
| Answer» E. | |
| 8. |
From which law of energy the ecosystem are not exempted? |
| A. | Zeroth law |
| B. | First law of thermodynamics |
| C. | Second law of thermodynamics |
| D. | Fifth law of thermodynamics |
| Answer» D. Fifth law of thermodynamics | |
| 9. |
How is the flow of energy from the sun to producers and then to consumers? |
| A. | Multidirectional |
| B. | Bidirectional |
| C. | No direction |
| D. | Unidirectional |
| Answer» E. | |
| 10. |
On what are the organisms are dependent on their food? |
| A. | Consumers |
| B. | Producers |
| C. | Decomposers |
| D. | Scavengers |
| Answer» C. Decomposers | |
| 11. |
What percent of PAR is captured by plants? |
| A. | 1% |
| B. | 20-30% |
| C. | 2-10% |
| D. | 50% |
| Answer» D. 50% | |
| 12. |
What percent of the incident solar radiation is photosynthetically active radiation (PAR)? |
| A. | 100% |
| B. | 85% |
| C. | 20% |
| D. | 50% |
| Answer» E. | |
| 13. |
What is the spectral range of solar radiation in that photosynthetic organisms are able to use in the process of photosynthesis called? |
| A. | Photosynthetically Reactive Radiation |
| B. | Photosynthetically Active Radiation |
| C. | Photosynthetically Deactive Radiation |
| D. | Photosynthetically Trapped Radiation |
| Answer» C. Photosynthetically Deactive Radiation | |
| 14. |
Which is an exception in an ecosystem where the sun is not the source of energy? |
| A. | Deep-sea hydro-thermal ecosystem |
| B. | Terrestrial ecosystem |
| C. | Lake ecosystem |
| D. | Desert ecosystem |
| Answer» B. Terrestrial ecosystem | |
| 15. |
What the only source of energy for all ecosystems on Earth? |
| A. | Water |
| B. | Sun |
| C. | Plants |
| D. | Animals |
| Answer» C. Plants | |