Terms : Hide Images
| 7757622555 | homologous structures | structures in different species that are similar because of common ancestry |  | 0 |
| 7757622556 | vestigial structures | remnants of features that served important functions in the the organism's ancestors |  | 1 |
| 7757622557 | convergent evolution | the independent evolution of similar features in different lineages |  | 2 |
| 7757622558 | Hardy-Weinberg | the frequencies of alleles and genotypes in a population will remain constant from generation to generation, provided that only Mendelian segregation and recombination of alleles are at work |  | 3 |
| 7757622559 | gene pool | the aggregate of all of the alleles for all of the loci in individuals in a population |  | 4 |
| 7757622560 | population | a group of individuals of the same species that live in the same area and interbreed, producing fertile offspring |  | 5 |
| 7757622561 | natural selection | a process in which organisms with certain inherited characteristics are more likely to survive and reproduce than are organisms with other characteristics |  | 6 |
| 7757622562 | genetic drift | changes in the gene pool due to random events | 7 | |
| 7757622563 | founder effect | when a individuals become isolated from a larger population, this smaller group may establish a new population whose gene pool differs from the source population |  | 8 |
| 7757622564 | bottleneck effect | when there is a severe drop in population size, certain alleles may be overrepresented among the survivors, others may be underrepresented, and some may be absent altogether |  | 9 |
| 7757622565 | gene flow | the transfer of alleles into or out of a population due to the movement of fertile individuals or their gametes | 10 | |
| 7757622566 | directional selection | when conditions favor individuals exhibiting one extreme of a phenotypic range, thereby shifting the frequency curve for the phenotypic character in one direction or the other |  | 11 |
| 7757622567 | disruptive selection | when conditions favor individuals at both extremes of a phenotypic range over individuals with intermediate phenotypes |  | 12 |
| 7757622568 | stabilizing selection | acts against both extreme phenotypes and favors intermediate variants |  | 13 |
| 7757622569 | sexual selection | a form of natural selection in which individuals with certain inherited characteristics are more likely than other individuals to obtain mates |  | 14 |
| 7757622572 | heterozygote advantage | when individuals who are heterozygous at a particular locus have greater fitness than do both kind of homozygous | 15 | |
| 7757622574 | speciation | the process by which one species splits into two or more species |  | 16 |
| 7757622577 | species | a group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring- but do not produce viable, fertile offspring with members of other such groups | 17 | |
| 7757622578 | reproductive isolation | the existance of biological barriers that impede members of two species from producing viable offspring | 18 | |
| 7757622580 | prezygotic barriers | impede mating or hinder fertilization if mating occurs (five types: habitat, temporal, behavioral, mechanical, gametic) |  | 19 |
| 7757622581 | post zygotic barriers | prevents hybrid zygote from developing into a viable fertile adult through reducing hybrid viability, reducing hybrid fertility, or hybrid breakdown | 20 | |
| 7757622582 | allopatric speciation | gene flow is interrupted when a population is divided into geographically isolated subpopulations |  | 21 |
| 7757622583 | sympatric speciation | speciation occurs in populations that live in the same geographic area (usually occurs due to polyploidy, habitat differentiation, and sexual selection) |  | 22 |
| 7757622585 | punctuated equilibrium | the theory that in the evolution there are long periods of little morphological change punctuated by relatively short periods of significant change |  | 23 |
| 7757622586 | endosymbiosis | mitochondria and chloroplasts were formally small prokaryotes that began living within larger cells |  | 24 |
| 7757622587 | adaptive radiation | Period of evolutionary change in which groups of organisms form many new species whose adaptations allow them to fill vacant ecological roles in their communities |  | 25 |
| 7757622589 | phylogeny | the evolutionary history of a species or group of species |  | 26 |
| 7757622592 | analogy | similarity due to convergent evolution |  | 27 |
| 7757622593 | homology | similarity due to shared ancestry |  | 28 |
| 7757622594 | clade | a group of species which includes an ancestral species and all of its descendants | 29 | |
| 7757622595 | outgroup | a species or group of species from an evolutionary lineage that is known to have diverged before the lineage that includes the species we are studying | 30 | |
| 7757622597 | Darwin's Theory (five parts) | 1. Variation 2. Overproduction 3. Competition 4. Survival of the fittest 5. Overtime, emergence of new species (new alleles) | 31 | |
| 7757622601 | abiotic synthesis | formation of organic molecules from inorganic material | 32 | |
| 7757622606 | extant | still in existance | 33 | |
| 7757622607 | fitness | ability to produce surviving offspring | 34 | |
| 7758846029 | behavior isolation | differences in mating calls in a sympatric species | 35 |
