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| The total number of persons inhabiting a country, city, or any district or area. |
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| The major subdivision of a genus or subgenus, regarded as the basic category of biological classification, composed of related individuals that resemble one another, are able to breed among themselves, but are not able to breed with members of another species. |
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| Most organisms produce more offspring than exist in their populations |
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| No two individuals of a species are identical. |
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| Limited amounts of things such as food, shelter, space, mates, etc. |
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| Arises between two or more species who use the same resource when that resource is finite and limited. |
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| Variation in environmental conditions |
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Definition
| Changes in the environment, either major such as global cooling (an ice age) or minor (such as the changing course of a river) |
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Definition
| Arises when the natural variation between populations gives some organisms a reproductive edge over other individuals with whom they compete. |
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| Differential Reproduction |
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Definition
| Some organisms will be better at surviving and reproducing than others. They will have a competitive advantage, and survive to leave more offspring than their competitors |
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Definition
| Occurs when the individuals who have a competitive advantage and who thus survive and reproduce more efficiently, come to outnumber those individuals who are less efficient at surviving and reproducing |
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Definition
| Over time, the environment “selects” out those organisms who are better suited to survive and reproduce under those environmental conditions |
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Definition
| Occurs when a species evolves into a new species because all or part of the individuals in that species became isolated in a new environment. |
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| Produced by natural selection acting over vast amounts of time to eliminate the original species and preserve the species which is better suited to the environmental conditions |
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| The result of most evolution by natural selection. Adaptation is the fine adjustment of a population to its environment |
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