Across
- 2. species change in a population
- 4. no one is harmed
- 8. aquatic organisms
- 9. conditions over a time period
- 12. interaction between animals
- 13. any necesity of life
- 15. surviving and reproducing under bad conditions
- 19. feeds on producers
- 20. feed on skin and blood
- 21. tall trees
- 22. frozen subsoil
- 23. day to day conditions '
Down
- 1. combination of algae
- 3. relationship between species
- 5. zone dark
- 6. water covers soil
- 7. where a organism lives
- 10. succession less predictable changes
- 11. what a orgasim does and thinks
- 12. sicessions break down rock
- 14. short trees
- 16. sucessions farming
- 17. dense forest
- 18. zone light
- 20. species first to colonize barren areas