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21 Cards in this Set
- Front
- Back
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Food chain |
hierarchical series of organisms each dependent on the next as a source of food |
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Food webs |
a system of interlocking and interdependent food chains |
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Biogeochemical cycles |
a pathway by which a chemical substance moves through both biotic (biosphere) and abiotic (lithosphere, atmosphere and hydrosphere) compartments of Earth |
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Nitrogen fixation |
the chemical process by which atmospheric nitrogen is assimilated into organic compounds, especially by certain microorganisms as part of the nitrogen cycle |
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Name the Characteristics of Biomes |
Temperature Climate Precipitation Rainfall |
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Population density |
measurement of population per unit area or unit volume; it is a quantity of type number density |
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Density dependent |
limiting factor that depends on population size |
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Density independent |
any factor limiting the size of a population whose effect is not dependent on the number of individuals in the population |
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Exponential growth |
growth rate of the value of a mathematical function is proportional to the functions current value |
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Logistic growth |
growth rate decreases as the population reaches carrying capacity |
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Carrying capacity |
number of people or things that can be held by a vehicle or container |
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Green house effect |
trapping of suns warmth in a planets lower atmosphere due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface |
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Global warming (cause) |
gradual increase in overall temperature of the earths atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons and other pollutants |
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Biotic |
Living |
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Abiotic |
Non-living |
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What is the function of the cell membrane? |
-it controls the movement of substances in and out of cells
-it is selectively permeable to ions and organic molecules |
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What is the function of organelles? |
small structures within cells that perform dedicated functions |
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Cell |
smallest unit of life that can replicate independently and are often called the "building blocks of life" |
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Organ |
make up an organism |
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Tissue |
Large masses of similar cells that make up a part of an organism and perform a specific function |
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Organ system |
A group of organs that perform one or more functions |
