HSA 2007 Biology Item 3

Use the technical passage “Exotic Species Versus Native Species, Who’s Winning?” to answer the following:

Which of these explains why the number of exotic organisms is increasing in ecosystems around the world?

1. The amount of global travel is increasing.
2. Increasing temperatures favor non-native organisms.
3. Native organisms are migrating to more remote locations.
4. The number of prey organisms is increasing worldwide.