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12 Cards in this Set
- Front
- Back
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Ecosystems
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Definition: systems that include both biotic and abiotic communities |
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Biotic
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Definition: any living thing or organism that lives in an ecosystem such as bacteria, fungi, parasites, plants and animals |
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Abiotic
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Definition: any non-living thing in an ecosystem |
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Biosphere
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Definition: the regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms |
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Hierarchy
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Definition: a system or organization in which people or groups are ranked one above the other according to status or authority |
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Heterotrophs |
Definition: an organism that is unable to make its own food and has to derive its nutritional requirements by consuming other living organisms |
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Autotrophs
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Definition: an organism that is capable of self nourishment using inorganic materials |
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Populations
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Definition: groups of the same species that are living in an area |
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Communities
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Definition: groups of populations living in an area |
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Population Density
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Definition: how many of a species exists in an area |
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Density Dependent Factors
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Definition: factors that depend on a population size |
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Density Independent Factors
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Definition: factors that are independent and can effect any population |
