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| Term | Definition |
|---|---|
| Organism | Living thing |
| Habitat | Environment that provides the things a specific organism needs to live |
| Biotic Factor | Parts of a habitat that are living or once living |
| Abiotic Factor | Nonliving part of an organism's habitat |
| Species | Group of organisms that can mate with each other and produce an offspring that can also mate and reproduce |
| Population | Members of one species living together in a particular area |
| Community | Different populations |
| Ecosystem | Community of organisms that live in a particular area along with non living environment |
| Ecology | The study of how organisms interact with each other |
| Birth Rate | Number of births per 1,000 individuals for a given time period |
| Death Rate | Number of deaths per 1,000 individuals for a given time period |
| Immigration | Moving into a population |
| Emigration | Leaving a population |
| Population Density | Number of individuals in an area of a specific size |
| Limiting Factor | An environmental factor that causes a population to stop growing or decrease in size |
| Carrying Capacity | Largest population would not grow much larger |