Ecology

2. close mutualistic, parasitic, or commensal association between two or more species that live together.
4. scientific study of all the interrelationships between organisms and their environment
8. physical area in which an organism lives.Ecosystem biological community and all the nonliving factors that affect it.
10. biotic or abiotic factor that restricts the number, distribution, or reproduction of a population within a community.Niche role, or position, of an organism in its environment.
11. any living factor in an organism’s environment.
12. act of one organism feeding on another organism.
13. all of Earth’s organisms and the environments in which they live.
14. all the interacting populations of different species that live in the same geographic location at the same time.

1. any nonliving factor in an organism’s environment, such as soil, water, temperature, and light availability.
3. symbiotic relationship in which one organism benefits and the other organism is neither helped nor harmed.
5. occurs when one or more organisms use the same resource at the same time.
6. large group of ecosystems that share the same climate and have similar types of communities.
7. symbiotic relationship in which one organism benefits at the expense of another organism.
9. symbiotic relationship in which both organisms benefit.
12. group of organisms of the same species that occupy the same geographic place at the same time.
15. organism’s ability to survive biotic and abiotic factors. As the body becomes less responsive to a drug, an individual needs larger and more frequent doses to achieve the same effect.