NC Biology EOC Review: Ecosystems

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What is Commensalism?

Back

A relationship between two organisms where one benefits and the other is neither helped nor harmed. Example: An egret looking for insects stirred up by the movement of a rhino.

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What is the carbon cycle?

Back

The process by which carbon is exchanged among the atmosphere, land, water, and living organisms. In a closed terrarium, all organisms must continue to exchange gases for the carbon cycle to continue.

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How do wolves benefit an ecosystem when reintroduced?

Back

They can eliminate weak animals from a prey population, thereby decreasing competition for natural resources.

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What happens when a nonnative species is introduced into a stable ecosystem?

Back

The native species will have to compete for resources with the nonnative species, leading to an unbalanced ecosystem.

Front

How much energy is left for a falcon if a rose receives 10,000 Joules of energy from the sun?

Back

10 Joules.

Front

Define Trophic Levels.

Back

The hierarchical levels in an ecosystem, comprising producers, primary consumers, secondary consumers, and tertiary consumers.

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What is the role of Decomposers in an ecosystem?

Back

Decomposers break down dead organic material, returning nutrients to the soil and helping to maintain the nutrient cycle.

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What is the difference between a food chain and a food web?

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A food chain is a linear sequence of organisms through which nutrients and energy pass, while a food web is a complex network of interconnected food chains.

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What is an Ecosystem?

Back

A community of living organisms interacting with their physical environment.

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What is Biodiversity?

Back

The variety of life in a particular habitat or ecosystem, including the number of different species.