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Flashcards on Food Webs and Trophic Levels
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What is a food web?
A network of interconnected food chains that shows the energy flow through different organisms in an ecosystem.
What is a trophic level?
The position of an organism in a food chain or food web, indicating its position in the transfer of energy.
What is a producer?
An organism that synthesizes food through photosynthesis or chemosynthesis, providing energy for other organisms in the food web.
What are primary consumers?
Organisms that consume producers (plants) for energy.
What are secondary consumers?
Organisms that primarily eat primary consumers for energy.
What are tertiary consumers?
Organisms that feed on secondary consumers or other tertiary consumers.
What are decomposers?
Organisms that break down dead plant and animal matter, recycling nutrients into the ecosystem.
What happens to energy as it moves through trophic levels?
Energy decreases, with only a fraction being transferred to the next level.
What are omnivores?
Organisms that eat both plants and animals.
What are apex predators?
Top predators in the food web that have no natural predators of their own.
What is biomagnification?
The process by which toxins become more concentrated as they move up the food chain.
What is a keystone species?
A species that plays a critical role in maintaining the structure of an ecosystem.
What is a primary consumer also known as?
Herbivore
What is a secondary consumer also known as?
Carnivore
What is a tertiary consumer also known as?
Apex predator
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Test Your Knowledge
Which of the following describes a food web?
A single chain showing energy flow
A network of interconnected food chains
A representation of energy pyramid
A diagram showing only producers
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What term is used to describe the position of an organism in a food chain or food web?
Energy level
Trophic level
Ecological niche
Population density
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Which organisms occupy the lowest trophic level in a food web?
Producers
Primary consumers
Secondary consumers
Decomposers
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What do secondary consumers primarily eat for energy?
Decomposers
Primary consumers
Primary producers
Tertiary consumers
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Which trophic level do humans typically belong to?
Producers
Primary consumers
Secondary consumers
Tertiary consumers
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What is the term for organisms that break down dead plant and animal matter?
Secondary consumers
Tertiary consumers
Decomposers
Producers
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What happens to energy as it moves through trophic levels?
Energy increases
Energy decreases
Energy remains constant
Energy fluctuates
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What are organisms called that eat both plants and animals?
Producers
Primary consumers
Secondary consumers
Omnivores
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Which of the following describes apex predators?
Primary producers
Primary consumers
Secondary consumers
Top predators with no natural predators
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What happens in biomagnification?
Energy increases exponentially
Energy decreases rapidly
Energy remains constant
Toxins become more concentrated
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