Across
- 1. extremely dry area
- 5. conditions in which an organism lives
- 6. treeless plain
- 8. dropping of sediments in a new place
- 9. deficiency of oxygen reaching the tissues
- 12. level of hierarchy in the ecosystem
- 13. biological community of interacting organisms
- 15. one benefits at the expense of the other
Down
- 2. capacity to endure
- 3. the smallest quantity
- 4. the breaking down of rocks
- 7. process of change to be suited to the environment
- 10. ability to maintain the internal environment of the body within the limits that allow its survival
- 11. area classified according to the species that thrives in it
- 14. describes the role an organism plays in a community