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Biology vocab ch15

Biology Vocab ch 15

definitionvocab
the actual age in years of a fossil absolute age
a trait not determined by genes but arising as a result of experience or behavior acquire trait
in populations, to change genetically over generations to become more suited to the environment adapt
in evolution, structures in more than one organism that have similar appearance and function but different embryological origin analogous structure
breeding of organisms by humans for specific phenotypic characteristics artificial selection
the mutual evolution of two different species interacting with each other coevolution
the act of preserving genes that remain unchanged in DNA conserve
the process by which unrelated species become more similar as they adapt to the same kind of environment convergent evolution
the process of two or more related species becoming more and more dissimilar divergent evolution
the dying out of a species extinct
a measurement of the ability of a species to respond to the pressures of natural selection; the ability of individuals to survive to propagate their genes fitness
the remains or traces of a once-living organism fossil
similar features that originated in a shared ancestor homologous features
a law that states that successive layers of rock or soil were deposited on top of one another and the lowest level is oldest law of superposition
one of the brief periods of time during which large numbers of species disappeared mass extinction
the process by which organisms with favorable variations reproduce at higher rates than those without such variations natural selection
all the members of a species that live in the same area and make up a breeding group population
the comparative ages of fossils found within a single stratum relative age
a principle that states that the geological structure of Earth resulted from cycles of observable processes and that these processes operate continuously uniformitarianism
referring to a functionless structure that was functional in an ancestral species vestigial
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