Ecology

Name: ______________________ Date: ____________

Use the clues to fill in the crossword.

Across

3. A group of people having a religion, ethnic, profession (9)
5. An organism that obtains energy by eating other organisms. (8)
8. The relation between two different species of organisms that are interdependent (9)
9. How plants make food from sunlight (14)
10. A terrestrial or aquatic flesh-eating mammal (9)
14. Tiny single-celled living things, some of which cause illness (8)

1. A major biotic community characterized by the dominant forms of plant life and the prevailing (5)
2. An organism that makes its own food, usually using sunlight. (8)
3. A business relation in which two parties ___ to gain customers (11)
4. The relation between two different kinds of organisms in which one receives benefits from the other (10)
6. The relation between two different species of organisms that are interdependent (9)
7. Plant capable of synthesizing its own food from simple organic substances (9)
10. An abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous ___ (6)
11. Available source of wealth (8)
12. Of or relating to living organisms (6)
13. The type of environment in which an organism or group normally lives or occurs (7)