Biology ยท Environmental Studies
Ecosystem Nutrition and Energy Flow
1,235 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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true
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false
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what's an autotroph?
A
Correct answer
Explanation
Autotrophs are organisms that produce their own food, such as plants. Since they are living organisms, the statement is true.
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Organisms that eat other organisms for food and energy
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Dinos who eat people
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People who love to eat
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Organisms who make their own food
D
Correct answer
Explanation
Autotrophs are organisms, such as plants and algae, that synthesize their own organic food using sunlight or chemical energy. Other options describe heterotrophs or are nonsensical.
A
Correct answer
Explanation
Autotrophs are known as producers because they produce their own food from inorganic sources. Consumers are heterotrophs that must eat other organisms.
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Yes they can
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No they can't
A
Correct answer
Explanation
Plants are autotrophs, meaning they use photosynthesis to convert sunlight, water, and carbon dioxide into glucose, which serves as their food.
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Parasites
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Insectivorous
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Symbiotic
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Saprotrophic
C
Correct answer
Explanation
Symbiosis is a close, long-term biological interaction between two different biological organisms. Parasitism is also a form of symbiosis, but the term 'symbiotic' is the general category for mutually beneficial or close associations.
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The tree is an autotroph and the bear is a heterotroph
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the tree is a heterotroph and the bear is an autotroph
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both organisms are autotrophs
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both organisms are heterotrophs
A
Correct answer
Explanation
Autotrophs (like trees) produce their own food through photosynthesis. Heterotrophs (like bears) must consume other organisms to obtain energy.
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Which organism consumes the next
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Where biomass flows
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Where energy flows
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Biomagnifcation
C
Correct answer
Explanation
In an energy pyramid, the arrows represent the direction of energy transfer from one trophic level to the next.
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producers
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consumers
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sun
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decomposers
D
Correct answer
Explanation
Decomposers break down dead organic matter, returning nutrients and energy back into the ecosystem and soil.
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combustion
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consumption
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respiration
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photosynthesis
B
Correct answer
Explanation
Consumption is the process where heterotrophs ingest organic matter, such as starch from plants, to obtain energy and nutrients. Combustion is a chemical burning process, while photosynthesis is the production of starch by plants.
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Insects
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Mosses, ferns, grasses
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Tubers, legumes, pine needles
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Small animals like rabbits
B
Correct answer
Explanation
Reindeer are herbivores and ruminants that primarily graze on mosses, lichens, ferns, and grasses in their natural arctic environment.
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Get hunted by other animals and get eaten.
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Hunt for animals and eat them.
A
Correct answer
Explanation
Prey are organisms that are hunted and consumed by predators for energy. This is a fundamental concept in food chain dynamics.
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<p>Get hunted by other animals and get eaten. </p>
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Hunt for animals and eat them.
B
Correct answer
Explanation
Predators are animals that hunt, kill, and consume other animals for food. Option A describes prey.
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Plants
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Both plants and animals.
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Animals
B
Correct answer
Explanation
Omnivores are organisms that have a diet consisting of both plant and animal matter. This allows them to utilize a wider variety of food sources.
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Plants. (They only eat producers)
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Meat. (They only eat other animals)
B
Correct answer
Explanation
Carnivores are animals that primarily consume the meat of other animals. Option A describes herbivores.