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adaptations binominal nomenclature allele frequency biochemistry analogous structures biogeography anatomical homologies bottleneck effect: behavioral isolation cladogram 1a the taxonomic name of an organism that consists of the genus and specie inherited characteristic that increases an organism's chance of survival similar amino acid sequences (DNA) among different species from a common ancestor; evidence of common ancestry number of times an allele occurs in a gene pool the study of the geographical distribution of living things anatomical structures that have the same function but different structures (butterfly's wings and bird's wings) a change in allele frequency following a drastic reduction in the size of a population morphological(form or structure) or physiological (function) similarities between different species of plants or animals diagram that shows the evolutionary relationships among a group of organisms form of reproductive isolation in which two populations have differences in courtship rituals or other types of behavior that prevent them from interbreeding 1b classification system directional selection coevolution disruptive selection common ancestor divergent evolution (adaptive radiation) convergent evolution diversity dichotomous key Domain 2a form of natural selection that occurs when individuals at one end of a distribution curve have higher fitness than individuals in the middle or at the other end of the curve a method to group and categorize organisms based on similarities into taxa form of natural selection that occurs when individuals at both ends of a distribution curve have higher fitness than individuals near the middle the evolution of two or more interdependent species, each adapting to changes in the other a single species or small group of species evolves into several different forms that live in different ways the most recent ancestral form or species from which two different species evolved all of the different species on Earth unrelated organisms independently evolve similarities when adapting to similar environments the highest level of classification; larger than a kingdom a tool that allows the user to determine the identity of organims consisting of a series of choices that lead the user to the correct name of a given item 2b embryology founder effect: Endosymbiotic Theory gene flow evolution gene pool fitness genetic drift fossil record geographic isolation 3a change in allele frequencies as a result of fhe migration of a small subgroup of a population the study of embryos; evidence of common ancestry the transfer of alleles of genes from one population to another theory that proposes that eukaryotic cells formed from symbiotic relationships among several different prokaryotic cells (mitochondria & chloroplast) the sum of all the genes in an interbreeding population is change in heritable traits of biological populations over successive generations change in the frequency of a gene variant (allele) in a population due to random sampling ability of an organism to survive and reproduce in its environment form of reproductive isolation in which two populations are separated physically by geographic barriers such as rivers, mountains, or stretches of water A term used by paleontologists to refer to the total number of fossils that have been discovered, as well as to the information derived from fossils. 3b gradualism punctuated equilibrium Kingdom characteristics reproductive isolation Kingdom classification speciation Miller-Urey experiment species natural selection stabilizing selection 4a pattern of evolution in which long stable periods (stasis) are interrupted by brief periods of rapid change extinction when speciation occurs over long periods of time rather than by sudden major changes the inability of a species to breed successfully with related species due to geographical, behavioral, physiological, or genetic barriers or differences chart of charateristics formation of new species a group of closely related phylums group of similar organisms capable of interbreeding and producing fertile offspring considered to be the classic experiment on how organic molecules, such as amino acids, needed for life were formed from inorganic material form of natural selection that occurs when individuals near the center of a distribution curve have higher fitness than individuals at either end 1. produce more offspring than can survive 2. variations occur in a species 3. competition for limited resources 4. better adapted organisms are more likely to survive and reproduce 5. change in a population occurs over many generations 4b taxomony taxon (plural: taxa) temporal isolation variation vestigial structure 5a discipline of classifying organisms and assigning each organism a universally accepted name; father is Carolus Linneaus a group or level of organization into which organisms are classified form of reproductive isolation that occurs when members of two species occupy similar habitats, but breed at different times the differences within a single species a structure that an organism has that is no longer serves a function, but that they have this structure because a common ancestor to that organism found it useful 5b