Term
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Definition
| the variety of ecosystems within a given region |
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Term
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Definition
| the variety of species within a given ecosystem |
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Term
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Definition
| the variety of genes within a given species |
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Term
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Definition
| the number of species in a given area |
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Term
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Definition
| the relative proportion of different species in a given area |
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Term
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Definition
| the branching patterns of evolutionary relationships |
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Term
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Definition
| a change in the genetic composition of a population over time |
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Term
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Definition
| evolution occuring below the species level |
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Term
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Definition
| evolution that gives rise to new species, genera, families, classes, or phyla |
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Term
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Definition
| physical locations on teh chromosomes within each cell of an organism |
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Term
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Definition
| the complete set of genes in an individual |
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Term
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Definition
| a random change in the genetic code produced by a mistake in the copying process |
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Term
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Definition
| the genetic process by which one chromosome breaks off ans ttaches to another chromosome during repoductive cell division |
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Term
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Definition
| a set of traits expressed by an individual |
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Term
| Evolution by artifical selection |
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Definition
| a change in the genetic composition of a population over time as a result of humans selecting which individuals breed, typically with a preconceived set of traits in mind |
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Term
| evolution by natural selection |
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Definition
| a change in the genetic composition of a population over time as a result of the environment determining which individuals are most likely to surivive and reporudce |
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Term
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Definition
| An individual's ability to survive and repoduce |
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Term
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Definition
| traits that improve an individual's fitness |
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Term
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Definition
| a change in the genetic composition of a population over time as a result of random mating |
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Term
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Definition
| a reduction in the genetic diversity of a population caused by a reduction in its size |
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Term
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Definition
| A change in a population descended from a small number of colonzing individuals |
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Term
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Definition
| physical separation of a group of individuals from others of the same species |
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Term
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Definition
| the result of two populations within a species evolving separately so they can no longer interbreed and produce viable offspring |
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Term
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Definition
| the process of speciation that occurs with geographic isolation |
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Term
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Definition
| the evolution of one species into two, without geographic isolation |
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Term
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Definition
| when scientists copy genes from a species with desirable traits |
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Term
| Genetically modified organisms |
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Definition
| an organism produced by copying genes from a species with a desirable trait and inserting them into another species |
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Term
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Definition
| the limits to the abiotic conditions that a species can tolerate |
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Term
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Definition
| the suite of ideal environmental conditions for a species |
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Term
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Definition
| the range of abiotic and biotic conditions under which a species actually lives |
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Term
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Definition
| areas of hte world in which a species lives |
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Term
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Definition
| a species that can live under a wide range of abiotic or bioitc conditions |
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Term
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Definition
| a species that is specialized to live in a specific habitat or to feed on a small group of species |
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Term
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Definition
| remains of organisms that have been preserved in rock |
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Term
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Definition
| a large extinction of species in a relatively short period of time |
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