Question

Invasive species often unbalance the ecosystems into which they are introduced because _______.
a.
they did not co-evolve with the natural species and lack natural controls, like predators
b.
they breed quickly and have the potential to overpopulate an area
c.
they consume local resources
d.
none of the above

Answer 1

a. They did not co-evolve with the natural species and lack natural controls, like predators — which lets them proliferate, outcompete natives for resources, and unbalance the ecosystem.