NEET Biology: Ecosystem Practice Questions
15 free multiple-choice questions on Ecosystem (Ecology and Environment) for NEET Biology, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. The flow of energy in an ecosystem is typically unidirectional. This direction of flow is best described as:
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Correct answer: C — Linear
Energy flows in one direction (from producers to consumers to decomposers) and is lost as heat at each trophic level, making the flow unidirectional.
Q2. The relationship between producers and consumers in an ecosystem is best described as a flow of energy. What is the direction of this energy flow?
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Correct answer: B — From producers to consumers
Energy flows from producers (autotrophs) to primary consumers, then to secondary consumers, and so on, hence the flow is from producers to consumers.
Q3. The specific role or position an organism occupies within its environment, including its interactions with other species, is known as its:
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Correct answer: A — Niche
The niche describes the functional role and ecological position an organism occupies in its ecosystem.
Q4. A habitat where a specific community of different organisms interacts with each other and their physical environment constitutes a(n):
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Correct answer: B — Ecosystem
An ecosystem is defined as the interaction between a biological community and its physical environment.
Q5. Which term refers to the physical space or environment where an organism lives?
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Correct answer: B — Habitat
Habitat is the specific physical place or environment where an organism lives.
Q6. The transfer of energy from one trophic level to the next in an ecosystem is typically inefficient. What is the approximate energy transfer efficiency?
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Correct answer: A — 10%
Only about 10% of the energy is transferred from one trophic level to the next, with the rest being lost as heat or used for metabolic processes.
Q7. Which of the following terms describes the interaction between living organisms and their physical environment?
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Correct answer: D — Biotic interaction
The interaction between living organisms and the physical components of their environment (abiotic factors) is defined as the ecological interaction or ecosystem interaction.
Q8. The role of decomposers in an ecosystem is most crucial for which process?
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Correct answer: B — Nutrient cycling
Decomposers break down dead organic matter, recycling essential inorganic nutrients back into the ecosystem for use by producers.
Q9. Which term describes the total amount of energy available in an ecosystem?
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Correct answer: C — Energy flow
Energy flow describes the movement of energy through the ecosystem, which is a key concept in understanding ecosystem dynamics.
Q10. In an ecosystem, the flow of energy is generally unidirectional. What is the primary source of energy for almost all ecosystems on Earth?
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Correct answer: D — Solar energy
The flow of energy in an ecosystem is driven primarily by solar energy captured by producers (photosynthesis).
Q11. In an ecosystem, which component is responsible for the primary production by converting solar energy into chemical energy?
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Correct answer: B — Producers
Producers, primarily plants, are responsible for photosynthesis, which is the process of converting solar energy into usable chemical energy.
Q12. Which of the following components is considered abiotic in an ecosystem?
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Correct answer: A — Sunlight
Abiotic components are the non-living physical and chemical factors of an ecosystem, such as sunlight, water, temperature, and pH. Bacteria, fungi, and carnivores are biotic components (living organisms).
Q13. Which of the following correctly defines an ecosystem?
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Correct answer: C — A biological community interacting with the non-living physical environment.
An ecosystem is defined as the interaction between living organisms (biotic community) and the non-living physical and chemical components of their environment (abiotic environment).
Q14. Decomposers in an ecosystem play which crucial role?
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Correct answer: A — Nutrient recyclers
Decomposers (like bacteria and fungi) break down dead organic matter, recycling essential nutrients back into the ecosystem for use by producers.
Q15. In a food chain, the organisms that produce their own food using sunlight are called:
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Correct answer: A — Producers
Producers (like plants) are autotrophs; they create their own food, usually through photosynthesis, forming the base of the food chain.
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