| A | B |
| Ecosystem | all biotic and abiotic factors in a particular environment |
| niche | the tole of an organism in its community |
| flora | plants and vegetation |
| fauna | animals |
| competition | when two organisms compete for the same resources |
| predation | one organism eats another (the prey) |
| symbiosis | close ecological relationship between 2 or more organisms of different species where at least one benefits |
| mutualism | symbiosis when both organisms benefit |
| commensalism | symbiosis when 1 organism benefits, the other is not affected |
| parasitism | symbiosis when one organism is harmed |
| biome | areas of the planet with characteristic climate, flora & fauna |
| biotic | living factors in an ecyosystem |
| abiotic | non-living factors in an ecosystem |
| habitat | the place where an organism lives |