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Definition
| similar in appearance or function, but derived from different ancestral structures |
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Definition
| structure that an ancestory used but is no longer functional in a current species |
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| any evidence of an organism that lived long ago (remnant, trace, or impression) |
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| when all the members of a species die out |
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| a species that no longer exists |
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| comparing DNA, RNA, and amino acid sequences in closely related organisms |
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| the study of the early stages of development in an organism, especially the comparison of closely related species. |
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| the first diploid cell resulting from the fusion of two gametes |
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| an organism in the early stages of development |
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| A tree-like diagram that depicts relationships between species |
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| the creation of new species by splitting a population in two, each with its own adaptations to environmental pressures |
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| change of allele frequency in a population over time |
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| the history of life as preserved in fossils |
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| a method for dating rocks by measuring radioactive decay |
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| the alteration of atoms as sub-atomic particles are released slowly over time |
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| differences in inherited traits among members of a population |
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| theory of how evolution occurs, organisms with advantageous genetic traits survive and reproduce more than less fit individuals |
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| a genetic trait the confers fitness to an organism in its environment |
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| when organisms produce more offspring than the environment can support |
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| when two organisms of the same or different species want the same resources (food, territory, shelter, mates, etc.) |
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| when organisms with more advantageous traits survive and reproduce while others do not |
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Definition
| products of reproduction, i.e. children |
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| all organisms of a species born within a period of time |
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| French naturalist who proposed that evolution resulted from the inheritance of acquired characteristics |
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| Inherited characteristics |
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| characteristics passed down from parent to offspring in genes |
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| characteristics an organism obtains throughout its own lifetime |
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| Revolutionary scientist who proposed evolution by natural selection in his book "On the Origin of Species" published in 1859 |
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| An archipelago off the coast of Ecuador where Charles Darwin made many observations |
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| a condition or event that can hurt a population of organisms |
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Definition
| the collection of all the alleles available in a population |
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| the form and structure of an organism |
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| Evolutionary biologist who proposed punctuated equilibrium in 1972 |
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| Theory that species spend long periods of time without evolving between spurts of quick change |
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| estimating the age of a rock by comparing with the age of nearby rocks |
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Definition
| determining the exact age of a rock by means of radioactive dating |
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| derived from the same ancestral structure |
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