1.In contrast to homoploid hybrid species,polyploid species are easily diagnosed because of chromosome number changes associated with genome doubling.

1.与同倍物种相比，因为与基因组加倍相关染色数化,倍物种很容易判断。

2.Scientists had theorized that homoploid hybrids would be more likely to form when the new species was adapted to life in an extreme environment.

2.科学家们有理论说同倍混血是在极端环境下新品种更加适应生存需求时出现。