Evolution 2
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each of the black spaces below before clicking
on it to display the answer.
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| Speciation | The process of one species giving rise to another
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| Species | a group of organisms that can breed and produce fertile offspring
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| geographic isolation | A population of organisms that is separated from exchanging genetic material with other organisms of the same species by a physical barrier. A common way for speciation to begin.
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| Reproductive isolation | The inability of a species to breed successfully with related species due to behavioral and physiological barriers or differences.
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| Lamark's Theory of Evolution | Individual organisms altered their behavior in response to environmental change. Their changed behavior, in turn, modified their organs, and their offspring inherited those "improved" structures.
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| Darwin's Theory of Evolution | All species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.
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| Evidence of Ancestry | Genetic data, embryology and vestigial structures are all used to support a common origin.
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| Comparative Embryology | The study comparing embryo development across species.
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| Vestigial structure | an anatomical feature that no longer seems to have a purpose in the current form of an organism of the given species. It may have performed some important function in the organism at one point in the past.
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| Homologous structure | An organ or bone that appears in different animals, underlining anatomical commonalities demonstrating descent from a common ancestor.
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| Genetic drift | a mechanism of evolution in which allele frequencies of a population change over generations due to chance
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| mimicry | structural adaptation that allows one species to resemble another species.
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| adaptation | a beneficial mutation that increases and organism's fitness
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| fitness | an organism's ability to survive and reproduce in an environment
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| coevolution | two or more species evolve together
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| convergent evolution | process by which two or more species become more similar as they adapt to the same kind of environment
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| divergent evolution | process by which two or more species become more and more dissimilar
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| analogous structure | structures in more than one species that have a similar appearance and function but different embryological origin
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