31. Parapatric speciation is the evolution of geographically adjacent populations into distinct species. 32. They also state that under this definition, sympatric speciation seems plausible. 33. These incompatibilities cause reproductive isolation, giving rise to rapid speciation events. 34. In species diversity, island biogeography most describes allopatric speciation . 35. Instances of speciation have been observed in both nature and the laboratory. 36. The authors of this study concluded that speciation was discernible. 37. Speciation through natal philopatry is a self-reinforcing process.38. This may be an example of allopatric speciation in ice age refugia. 39. Speciation is a human-defined ( and rather ambiguous ) construct.40. In fact, that's the most common cause of speciation .
