Final answer:
Invasive species excel in new environments due to pre-adaptations that suit diverse conditions and a competitive edge over native species for resources, often lacking natural predators.
Step-by-step explanation:
Two specific characteristics of invasive species that enable them to thrive in new environments are pre-adaptations to diverse conditions and the ability to out-compete native species for resources.
Pre-adaptations might include a wide range of tolerances to different environmental factors, which allow invasive species to swiftly acclimate and proliferate.
On the other hand, the absence of natural predators and the ability to compete more effectively for resources often lead to invasive species dominant over native species, causing ecological imbalances and threatening biodiversity.