| A | B |
|---|
| organism | one complete living thing |
| species | similar organisms living in similar place that can produce fertile offspring |
| population | groups of the same speciesliving in the same area |
| habitat | The place where populations live |
| communities | many different populations living in the same place competing for food, water and shelter |
| Ecosystem | the interaction of communities with non living environment |
| succession | the change in ecosystems over time |
| ecology | the study of ecosystems |
| biomes | groups of ecosystems located in similar areas of the world |
| biosphere | places in the world where life exists |
| biotic factors | living factors |
| abiotic factors | non living factors |
