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Stack #868936

LS Evolution

QuestionAnswer
absolute dating Any method of measuring the age of an object or event in years, such as using the atomic half-life.
fossil record The sequence of life's history as indicated by organisms that have lived in the past.
cast Copies of fossilized plants or animals.
divergent evolution The theory that explains how members of the same species can become different over time.
adaptation A trait that helps an organism to survive and reproduce in its environment.
theory An explanation of a set of related observations or events based upon proven hypotheses and well-tested by many scientists.
branching tree A model or diagram showing the evolutionary relationship among organisms.
natural selection The process by which organisms that are better adapted to their environments survive and reproduce more successfully than others within their population.
mold Hollow impression of a fossil.
evolution The gradual change in a species over time.
homologous structures Structures that are similar, but have different functions.
coevolution The evolution of two species that is due to mutual influence, often in a way that makes the relationship more beneficial to both species.
variation A part of natural selection in which individuals have different traits.
convergent evolution The theory that explains how organisms can become more alike over time.
sedimentary rock A type of rock that is formed by the layering of material at Earth's surface and within bodies of water.
speciation This occurs when a single population evolves into two populations that cannot interbreed any more.
relative dating Any method of determining whether an event or object is older or younger than others.
artificial selection When humans select organisms with desirable traits that will be passed from one generation to another.
extinction A word describing the process of a species dying out forever.
fossil The trace remains or physical evidence of an organism preserved by geological processes.
Created by: lifescience2011
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