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unit5vocabCM

QuestionAnswer
absolute (radiometric) daiting a method of determining the age of a fossil using radioactive atoms.
adaptation any structure or behavior that allows a population to survive in their environment.
adaptive radiation evolutionary pattern in which many species evolve from a single ancestor.
analogous different structures with common functions.
convergent evolution process by which different species become more alike when living in similar environments.
divergent evolution process by which similar species become less alike when living in different environments.
evolution gradual change in a species over time.
extinction the death of every member of a species
fossil evidence of an organism that lived in the past
homologous similarly built structures with different functions
natural selection when organisms survive,reproduce,and pass favorable traits tp the next genertion
relative daiting a method of determining an estimated age of a fossil within layers of the earth
speciation process by which new species are formed
strata layers of rock (sedimentary rock)
vestigial a body structure that at one time was very useful,however now it has limited functions
competition organisms battle for resources in their populations
common ancestry idea organisms closely related to each other had a common ancestor
invertebrate organism that does NOT have a backbone (spine), evolved before vertabrates
vertebrate organism that DOES have a backbone (spine); evolved after invertebrates
mammal animal that has hair and produces milk for young; last to evolve
variation difference in a particular trait within a population (ex. finch beaks- size and shape; marine iguanas- color)
Created by: cm19474
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