Across
- 6. To watch carefully, especially with attention to details
- 8. Pertaining to a woody plant whose leaves fall at the end of the growing season
- 10. The zone on the surface of the Earth where all life exists
- 11. A group of plants growing together or all of the plants and animals of an area
- 13. The study of the relationships among living things.
- 14. An occupation or profession followed as one's lifework
- 16. A substance that cannot be decomposed into other substances
- 17. A group of similar organisms that are found in the same area; a coexisting and interbreeding group of individuals of the same species in a particular location
- 18. The total wildlife of an area in the broadest sense, including wild mammals, birds, fish, reptiles, insects, and small animals
- 21. Of, relating to, or being a method of harvesting or using a resource so that the resource is not depleted or permanently damaged.
- 22. To watch carefully paying attention to details.
Down
- 1. Used in ecology to include major life in an area
- 2. The elements of supply existing in an area that can be used to satisfy the needs of people.
- 3. The use of a a natural resource in such a way as to minimize waste and maintain the resource in as good a condition as practical
- 4. An attempt to prevent the use of some natural resource or the modification of an environment keeping it intact.
- 5. A system of interrelated organisms and their physical and chemical environment
- 7. In the name of plants and animals, Latin is used
- 9. The act of using without replacing
- 12. The nonliving elements of the environment
- 15. An environment in which a plant or animal lives
- 19. Pertaining to life; biological
- 20. The aggregate of plants that grow without cultivation in a given area within a state period of time