glaciation

• ( 2 ) the mechanism of pollination off . mollis . ( 3 ) e . mollis is a long - lived species , ( 4 ) a feature of the flora in the southwest of shanxi is its antiquity associated with prolonged geographical stability and no obvious extinction episodes caused by recent glaciations . genetic divergence over all populations was very low ( fst = 0 . 019 )
  翅果油树有较高的遗传多样性，主要原因可能是( ? )由翅果油树种群的分布格局所决定； ( ? )翅果油树是一种长寿命的植物； ( ? )翅果油树所生存的地质环境较为稳定； ( ? )由翅果油树的授粉机制所决定。