Ecology: Trophic Levels and Organization

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What is a predator-prey relationship?

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A predator-prey relationship is an interaction where one organism (the predator) hunts and eats another organism (the prey). Example: A wolf eating a sheep.

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What is an autotroph?

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An autotroph is an organism that produces its own food, typically through photosynthesis. They form the base of the food chain.

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What is a heterotroph?

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A heterotroph is an organism that cannot produce its own food and must consume other organisms for energy.

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What are omnivores?

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Omnivores are organisms that eat both producers (plants) and consumers (animals). Example: Humans and bears.

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What is a niche in an ecosystem?

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A niche is the role of a species in an ecosystem, including what it eats, when it eats, and how it interacts with other organisms.

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What is a food web?

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A food web is a complex network of feeding relationships among organisms in an ecosystem, showing how energy and nutrients flow.

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What is an energy pyramid?

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An energy pyramid is a graphical representation of the energy flow in an ecosystem, showing the energy available at each trophic level.

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What percentage of energy is typically transferred from one trophic level to the next?

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Typically, only about 10% of energy is transferred from one trophic level to the next in an ecosystem.

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What are primary producers?

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Primary producers are organisms that produce energy available for the rest of the ecosystem, mainly through photosynthesis.

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What are primary consumers?

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Primary consumers are organisms that eat primary producers. They are usually herbivores.