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15 Cards in this Set
- Front
- Back
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Species 3
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1) a group of similar organisms whose 2) members frequently interbreed
3) members of non-species generall do not interbreed |
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Population
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group of organisms of same species that live in same place at same time
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Community
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natural association that consists all the populations of different species that live and interact within an area
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Ecosystem
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a community and its physical environment
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Landscape
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a region that includes several interacting ecosystems
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Biosphere 3
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the parts of earths atmosphere:
1) ocean 2)land surfae 3) and soil that contain all living organisms |
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First Law of Thermodynamics
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energy cannot be created or destroyed, although it can chane from one form to another
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Second Law of Thermodynamics
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when energy is converted from one form to another, some of it is degraded into heat, a less usable form that disperses into the environment
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Energy Flow
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the passage of energy in a one way direction through an ecosystem
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Trophic Level
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An organism's position in a food chain, which is determined by its feeding relationships
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Food Web
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a representation of the interlocking food chains that connect all organisms in an ecosystem
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Gross Primary Productivity
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GDP- the total amount of photosynthetic energy that plants capture and assimilate in a given period
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Net Primary Productivity
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NPP- productivity after respiration losses are subtracted
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Evolution
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cumulative genetic changes that occur over time in a population of organisms; evolution explains many patterns observed in the natural world
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Natural Selection
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the process in which better-adapted individuals- those with a combination of genetic traits better suited to enviornmental conditions- are more likely to survive and reproduce, increasing their proporttion in the population
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