Biology ยท Environmental Studies
Ecosystem Nutrition and Energy Flow
1,093 Questions
Ecosystem nutrition and energy flow questions cover trophic levels, food chains, and biodegradable materials. These concepts frequently appear in general science sections of major competitive exams. Review these questions to build a solid understanding of ecological interactions.
Trophic levels conceptFood chain orderAutotrophic nutritionEnergy assimilationScavengers and decomposers
Ecosystem Nutrition and Energy Flow Questions
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Sun - rodent - grass - wolf - fox
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grass - Sun - rodent - fox - wolf
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Sun - grass - rodent - fox - wolf
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wolf - fox - rodent - grass - Sun
C
Correct answer
Explanation
A food chain typically starts with an energy source (the Sun), followed by a producer (grass), then consumers (rodent, fox, wolf).
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flower
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butterfly
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toad
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hawk
C
Correct answer
Explanation
In the chain Sun - flower (producer) - butterfly (primary consumer) - toad (secondary consumer) - hawk (tertiary consumer), the toad is the secondary consumer.
B
Correct answer
Explanation
Producers are organisms that make their own food, typically through photosynthesis. In this chain, the shrub is the producer.
A
Correct answer
Explanation
Tertiary consumers are often apex predators, meaning they occupy the top of the food chain and are not typically preyed upon by other animals.
A
Correct answer
Explanation
Bears are well-known omnivores, as they consume a wide variety of plant matter (berries, roots) and animal matter (fish, small mammals).
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top producer
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ultimate producer
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prime carnivore
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tertiary consumer
D
Correct answer
Explanation
A tertiary consumer is a carnivore at the top of the food chain that feeds on other carnivores or herbivores.
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carnivores
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omnivores
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herbivores
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carnherbivores
B
Correct answer
Explanation
Organisms that eat both plants and animals are classified as omnivores.
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small birds
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cougars
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raccoons
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chipmunks
B
Correct answer
Explanation
Cougars are typically apex predators (tertiary consumers) in a forest habitat, not secondary consumers.
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secondary consumers
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secondary producers
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third-level consumers
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tertiary consumers
A
Correct answer
Explanation
Primary consumers eat producers. Secondary consumers eat primary consumers.
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omnivore
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carnivore
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herbivore
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plantivore
C
Correct answer
Explanation
An herbivore is an animal that feeds exclusively on plant material.
A
Correct answer
Explanation
A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.
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decomposer
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primary consumer
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secondary consumer
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tertiary consumer
B
Correct answer
Explanation
A primary consumer is an organism that feeds directly on producers, such as plants or algae. Decomposers break down dead matter, while secondary and tertiary consumers eat other animals.
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producers
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primary consumers
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tertiary consumers
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decomposers
A
Correct answer
Explanation
Producers, such as plants and algae, use sunlight to perform photosynthesis and convert solar energy into chemical energy. Consumers and decomposers rely on other organisms for their energy.
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It points to the thing that is weaker
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It points to the thing where energy is given
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It points to the thing where energy is taken away
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It points to the thing because they like each other
B
Correct answer
Explanation
In a food chain diagram, the arrow points from the organism being eaten to the organism that consumes it, representing the flow of energy from one trophic level to the next.
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carbon cycle
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food chain
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unlucky day
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ecosystem
B
Correct answer
Explanation
A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.