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Unit 4

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.
Created by: bishop806