Ecology

7. Organisms that can interbreed and produce fertile young
8. When both species benefit from a relationship
9. A species which indicates how healthy an ecosystem is
12. A trait that helps an organism survive and reproduce
18. Succession that occurs on surfaces where no soil exists
19. Any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms
20. A species whose numbers are so small that the species is at risk of extinction
21. Non-living factors in an environment
22. All the biotic and abiotic factors in a particular area
24. When population growth hovers around the carrying capacity
25. How an organism lives, finds its food, find its mate, build and maintains its home, along with the role it plays within its ecosystem

1. First species, such as lichen, to populate an area during primary succession
2. When one species benefits while the other species is harmed
3. Largest number of individuals of a population that an environment can support
4. When populations begin growing faster as they grow larger
5. One species living in a particular area
6. Occurs when species share the same resources
10. A process in which individuals with traits that help them survive and reproduce better pass on those traits so that, over time, those traits become more common within a population
11. The variety of life in the world or within a particular ecosystem
13. A species that has an unusually large effect on its ecosystem
14. Succession following a disturbance that destroys a community without destroying the soil
15. Just the biotic factors or all the populations within an ecosystem
16. Living factors in an environment
17. When one species benefits but the other neither benefits nor is harmed
23. A change in a population over time