Evolution part 2 Crossword

change in allele frequencies due to chance alone, occurring most commonly in small populations
genetic drift that results from an event that drastically reduces the size of a population
genetic drift that occurs after a small number of individuals colonize a new area
selection in which certain traits enhance mating success; traits are, therefore, passed on to offspring
– final stage in speciation, in which members of isolated population are either no longer able to mate or no longer able to produce viable offspring
evolution of two or more species from one ancestral species
isolation between populations due to differences in courtship or mating behavior
isolation between populations due to physical barriers
isolation between populations due to barriers related to time, such as differences in mating periods or differences in the time of day that individuals are most active
evolution toward similar characteristics in unrelated species, resulting from adaptations to similar environmental conditions
evolution of one or more closely related species into different species; resulting from adaptations to different environmental conditions
process in which two or more species evolve in response to changes in each other
elimination of species from earth
theory that states that speciation occurs suddenly and rapidly followed by long periods of little evolutionary change
process by which one species evolves and gives rise to many descendant species that occupy different ecological niches
amount of time it takes for half of the isotope in a sample to decay into its product isotope
fossil of an organism that existed during only specific spans of geologic time across large geographic areas