Chapter 4 Changes in Ecosystems
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Created by:
cstrawn201 on November 9, 2009
Subjects:
science, fourth grade, geschichte
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7 terms
Terms | Definitions |
|---|---|
 competition | when two or more species in an ecosystem must use the same limited resources |
| parasite | an organism that lives on or in another organism, helping itself but hurting the other organism |
| host | an organism that is harmed by a parasite |
| succession | gradual change from one community of organisms to another |
| extinct | an entire species is extinct if it has died out and is gone forever |
| endangered | a species is endangered if it is in danger of becoming extinct |
| hazardous wastes | substances that are very harmful to humans and other organisms |
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