41. It is S�o Paulo without evidence of interbreeding . 42. He began secret experiments, trying to refresh the bloodline by interbreeding with mankind. 43. If interbreeding is no longer possible, then they will be considered different species. 44. For animals, interbreeding is well-accepted as the primary indicator of species. 45. Tracking the two populations over six years, the researchers found little evidence of interbreeding . 46. Two groups that are not freely interbreeding are presumed to be on separate evolutionary paths. 47. Those early people remained on the same evolutionary path by sharing their genes through interbreeding . 48. The Biological Species Concept ( BSC ) is a classic example of the interbreeding approach. 49. After few years of interbreeding , poems such as the following two began to emerge. 50. The scarcity of the pure wild species is partly due to interbreeding with feral birds.
