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Evolution/Genetics
Unit 4
Term | Definition |
---|---|
Analogous Structures | Analogous structures are structures of different species having similar or corresponding function but not from the same evolutionary origin. For example, wings of insects and birds used for flying. |
Biological Classification | Classifying or putting organisms into groups |
Charles Darwin | credited with the biological theory of evolution |
Extinct | No longer exists |
Homologous Structures | Homologous structures are body parts that are alike because the species in question share a common ancestor. These structures may serve the same or different functions. |
Evolution | Evolution is change in the heritable traits of biological populations over successive generations. |
Vestigial Structures | A vestigial structure is a structure, or organ, that appears to have lost all, or most, of its functions through the process of evolution. Examples include the tail bone, wisdom teeth, and appendix in humans. |
Adaptation | A trait that helps an organism survive and reproduce. |
Convergent Boundary | A boundary where two tectonic plates push into each other |
Divergent Boundary | A boundary where two tectonic plates move away from each other |
Genetic Variation | The differences in traits that exist within a population. |
Phenotype | A phenotype is the composite of an organism's observable characteristics or traits. |
Plate Tectonic Theory | a theory explaining the structure of the earth's crust resulting from the interaction of rigid lithospheric plates that move slowly over the underlying mantle |
Species | A group of similar organisms that can mate to produce fertile offspring. |
Traits | An inherited characteristic. |
Transform Boundary | A boundary where two tectonic plates slip past each other. |
Variation | The differences in traits that exist within a population. |