1. The species were directly introduced through predation, competition and hybridization . 2. Hybridization without change in chromosome number is called homoploid hybrid speciation.3. Other hybridization schemes are also found in other types of molecules. 4. Hybridization observed where their ranges overlapped added weight to this view.5. Some hybridization with the blue jay in Colorado has been reported. 6. Hybridization leads to introgression of alleles from one species to another.7. Signal amplification is achieved via a series of sequential hybridization steps. 8. Hybridization between two different species sometimes leads to a distinct phenotype.9. Another concern with evolutionary implications is a suspected increase in hybridization . 10. The titles of the chapters themselves provide further examples of hybridization .