Ecology Review

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What is an ecosystem?

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An ecosystem is made up of communities of living organisms (biotic factors) and the abiotic factors (non-living elements) in their environment.

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What percentage of energy does an organism lose to the environment?

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Organisms lose approximately 90% of energy to the environment.

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What is the difference between density-dependent and density-independent factors?

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Density-independent factors, like natural disasters, affect populations regardless of their size, while density-dependent factors, like disease, have a greater impact as population density increases.

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Where does the energy for biomass come from?

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The energy for biomass is generated from ancient plants and animals.

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What is a by-product of respiration?

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Carbon dioxide is a by-product of respiration.

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Define a biome.

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A biome is a large geographical biotic unit, a major community of plants and animals with similar life forms and environmental conditions.

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What role do producers play in an ecosystem?

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Producers, such as plants, convert solar energy into chemical energy through photosynthesis, forming the base of the food chain.

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NGSS.MS-LS1-6

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What is the significance of the food chain?

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The food chain illustrates the flow of energy and nutrients through different trophic levels in an ecosystem.

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What is biodiversity?

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

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What is the carbon cycle?

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The carbon cycle is the process by which carbon is exchanged among the atmosphere, land, water, and living organisms.

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