Across
- 4. | The complete disappearance of a species from Earth.
- 7. | The surroundings or conditions in which a person, animal, or plant lives.
- 9. | The plant life of a particular region or period.
- 12. | The introduction of harmful substances into the environment.
- 14. | The process by which different kinds of living organisms have developed and diversified from earlier forms.
- 16. | The study of heredity and variation in organisms.
- 17. | The way different organisms rely on each other for survival.
- 18. | The protection and management of natural resources and biodiversity.
- 20. | A large naturally occurring community of flora and fauna occupying a major habitat, e.g. forest or desert.
Down
- 1. | The process by which organisms adjust to their environment to survive.
- 2. | The natural home or environment of an organism.
- 3. | A community of living organisms interacting with their non-living environment.
- 5. | Existing in or caused by nature, not made or caused by humankind.
- 6. | Maintaining something in its original or existing state, especially natural areas.
- 8. and the Environment
- 9. | The animal life of a particular region, habitat, or geological period.
- 10. | A species at risk of becoming extinct.
- 11. | A group of similar organisms capable of breeding and producing fertile offspring.
- 13. | The variety of different species and ecosystems in a specific area.
- 15. | Returning an ecosystem or habitat to its original condition.
- 19. | The average weather conditions of an area over a long period of time.