Across
- 4. The loss of an entire species, forever and ever
- 5. "Leaves of three, let them be..."
- 7. A system that consists of all of the abiotic and biotic factors that occur within an environment
- 9. A toxin that effects the blood and other connective tissue
- 10. A nonliving factor in the environment
- 11. A species can that disrupt biodiversity and food webs by competing with or harming species native to that ecosystem
Down
- 1. A living factor in the environment
- 2. The number of species in a given area
- 3. Species that are critical to the survival of the other species in the ecosystem
- 6. A toxin that effects the nervous system
- 8. The variety of species on Earth