Across
- 4. feeding no food chain
- 5. occurs when competing
- 7. final stage
- 8. both plants and animals
- 9. study of something living
- 12. numbers and species
- 17. ticks
- 18. first to colonize
- 19. both benefit
- 21. psychical environment
- 22. eats grass, plants
Down
- 1. factor me, and u
- 2. gets hunted
- 3. formally inhabitiated
- 6. rats, vulture
- 7. energy used from chemical compound.
- 10. web web of food
- 11. species plays a huge role
- 13. sun, water, rocks
- 14. eats meat
- 15. final step in decomposition
- 16. harmed by parasite
- 20. role of species
- 23. total mass of organism