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Branch of biology that deals with interactions among organisms and

between organisms and their environment.

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What is ecology?

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The lowest level of environmental complexity

that includes living and non-living factors.

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What is ecosystem?

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All the members of a particular species living in

one area.

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What is population?

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The simplest grouping of more than one organism in

the biosphere.

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What is community?

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An organism that uses energy to produce its own

food supply from inorganic compounds.

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What is autotroph?

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A bacteria that uses chemicals to produce its

food.

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What are chemosynthetic bacteria?

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Compared to land, open oceans are low in the level

of these.

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What are nutrients?

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The total amount of living tissue within a given

trophic level.

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What is biomass?

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The term for each step in the transfer of energy and matter within a food web.

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What is a trophic level?

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A snake that eats a rabbit that eats grass is this level

on the food chain.

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What is a secondary consumer>

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The amount of energy that passes to the next trophic

level.

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What is 10%?

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The type of pyramid that shows the amount of living tissue at each trophic level

in an ecosystem.

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What is a biomass pyramid?

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What type of pyramid shows the number of

organisms at each trophic level.

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What is a pyramid of numbers?

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A natural phenomenon that maintains the Earth’s temperature range.

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What is the greenhouse effect?

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The process by which bacteria convert nitrogen gas in the air to ammonia.

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What is nitrogen fixation?

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The result of a lake having a large input of limiting

nutrients.

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What is an algal bloom?

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The rate at which organic matter is created by

producers in an ecosystem.

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What is primary productivity?

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The average year-after-year condition of temperature and

precipitation in a particular region.

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What is climate?

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A symbiotic relationship in which both species benefit.

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What is mutualism?

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The series of predictable changes that occurs in a community over time.

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What is ecological succession?

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Primary succession can begin after this.

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What is volcanic activity?

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In the photic zone this can occur.

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What is photosynthesis?

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This cannot occur in the aphotic zone.

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What is photosynthesis?

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Depth, flow, temperature, and chemistry.

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What are ways aquatic ecosystems are classified?

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An ecological inquiry method an ecologist uses

when studying populations of a certain species.

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What is modeling?