Ecology Crossword

2. the level an organism occupies in its food chain
5. The supply of nutrients is limited and therefore ecosystems constantly recycle the nutrients between organisms.
7. able to be maintained at a certain rate or level
8. Physiological or behavioral changes that allow the organism to
11. a substance that provides nourishment essential for growth and the maintenance of life
12. a process that results in changes in the genetic material of a population over time
16. tending to be different or develop in different directions

1. an organism that creates its own food or energy
3. an organism whose presence/absence reflects a specific environmental condition
4. coming closer together, especially in characteristics or ideas
6. the process of taking food, drink, or another substance into the body by swallowing or absorbing it
9. a substance that provides nourishment essential for growth and the maintenance of life
10. exert top-down influence on lower trophic levels and prevents species at lower trophic levels from monopolizing critical resources
13. the order of events in an ecosystem where one living organism eats another organism and later that organism is consumed by another larger organism
14. the specialized habitat of an organism
15. living things