Glossary of Evolutionary Biology Terms, Quizzes of Theory of Evolution

Download Glossary of Evolutionary Biology Terms and more Quizzes Theory of Evolution in PDF only on Docsity! TERM 1 senescence DEFINITION 1 a decline with age in reproductive performance, physiological function, or probability of survival TERM 2 cryptic species DEFINITION 2 species that are indistinguishable morphologically, but divergent in songs, calls, odor, or other traits TERM 3 secondary contact DEFINITION 3 when two populations that have diverged in isolation from a common ancestor are reunited geographically TERM 4 allopatric model DEFINITION 4 the hypothesis that speciation occurs when populations become geographically isolated and diverge because selection and drift act on them independently TERM 5 vicariance DEFINITION 5 splitting of a population's former range into two or more isolated patches TERM 6 sister species DEFINITION 6 the species that diverged from the same ancestral node on a phylogenetic tree TERM 7 bottlenecking DEFINITION 7 a large-scale but short-term reduction in population size followed by an increase in population size TERM 8 reinforcement DEFINITION 8 natural selection that results in assortative mating in recently diverged populations in secondary contact also known as reproductive character displacement TERM 9 prezygotic isolation DEFINITION 9 reproductive isolation between populations caused by differences in mate choice or timing of breeding, so that no hybrid zygotes are formed TERM 10 postzygotic isolation DEFINITION 10 reproductive isolation between populations caused by dysfunctional development or sterility in hybrid forms