Unit Nine Crossword

2. When the population of a species is too big for their environment to support.
5. The amount of life an area can support before it collapses.
6. An organism that can create it's own food from the sun.
7. How much an ecosystem can replenish and heal itself when faced with damage.
9. Certain attributes that an organism can possess.
11. A struggle between two or more organisms for a limited resource.
13. Pollution that comes from multiple sources and cannot be identified.
14. A level of biological organization that includes all biotic and abiotic factors in an area.
19. An organism's reliance on other factors in it's environment.
24. Factors in an environment that limit a population from growing any larger.
26. The random chance that an organism has of surviving and reproducing.
27. The mix of different genes available in the gene pool of a species.

1. traits organisms develop in order to survive in their environment.
3. When humans use more resources than can be replenished on its own.
4. A manmade structure made to resemble a reef or to encourage coral to grow there.
8. Pollution that comes from one identifiable source.
10. The useable substances in an environment.
11. A level of biological organization that includes all of the abiotic factors in an area.
12. The variety of organisms in an area
15. An organism that must consume other organisms in order to survive.
16. A model depicting the trickle of energy through an ecosystem.
17. Water that runs off of surfaces and culminates in lower areas.
18. The living factors in an environment.
20. A level of biological organization that includes all organisms of the same species.
21. The surroundings of an organism.
22. A behavior that an organism has to learn and is not born knowing.
23. a factor in an ecosystem is a non-living component, such as water.
25. A role in an environment that must be filled for the ecosystem to function.
28. The study of the relationships between organisms and their surroundings.