Vocab: Ecological Species concept, reproductive isolation, hybrids, morphological species concept, phylogeneitc species concept, prezygotic barriers, postzygotic barriers, allopatric speciation, sympatric speciation, adaptive radiation, hybrid sones,Sexual Selection, Intrasexual, Intersexual, Sensory Exploitation, Conspecific, Runway selection model, Interspecific, Hybridization, Arbitrary Traits - Good Genes Model, Indicator traits , Classic Handicap Model, Condition Dependent Indicator Model , Revealing Indicator Model, Ornaments, Auditory Signals, Vocal Signs, Copulation, Nuptial Gift