Across
- 6. A district of Mexico City
- 8. Regrowing parts of the body.
- 10. Something that helps filter and clean contaminated water
- 12. An unhatched offspring
- 13. Dying out to the point where there are no more
- 15. Creatures that begin in water, then slowly move out to land
- 19. Good for something/someone
- 21. Woven rafts anchored in shallow water used to grow food.
Down
- 1. A part of Mexico; The main city
- 2. Having juvenile features even in old age
- 3. A frilly salamander
- 4. A community of organisms interacting with eachother
- 5. Animals that often invade a place they don’t belong in, often throwing off the balance of the ecosystem
- 7. A change to something, usually an abnormal change
- 9. Food chains of what eats what in an ecosystem
- 11. Changing over time to adapt
- 14. Living in the best possible conditions
- 16. A creature studied intensely to help scientists understand biological processes in humans
- 17. Start; origin or beginning of something.
- 18. Body parts that help animals get oxygen
- 20. The immature form of an animal