Across
- 4. The__________ prohibits transporting live or dead wild animals, or their parts, across state borders without a federal permi
- 7. Birds and amphibians can act as early warnings of environmental change. What type of species are they?
- 8. Many invasive species have no natural predators, which can contribute to rapid population growth.
- 9. A species may be vulnerable to extinction if it has a low reproduction rate or feeds at_____trophic level
Down
- 1. Fire ants were accidentally introduced to the United States in lumber from
- 2. When a species is no longer found anywhere on Earth, it has undergone .
- 3. A species with so few individuals that it could soon become extinct is considered .
- 5. Name a keystone species other than the beaver covered in class
- 6. Under ______________listed species threatened with extinction cannot be commercially trade