| A | B |
| ecology | the study of the relationship between living organisms and their environment |
| ecologist | someone who studies natural relationships |
| habitat | a place where an organism lives |
| adaptation | inherited characteristics that help an organism survive and reproduce in its environment |
| mutualism | A relationship between 2 species where both species benefit. |
| Allelopathy | When a plant produces subtances that inhibit the growth of other plants |
| mutualism | a relationship where both partners benefit |
| parasitism | a relationship where one partner benefits, the other is harmed |
| commensalism | a relationship where one partner benefits, and the other appears unaffected |
| host | the partner that is harmed in a parasitic relationship |
| parasite | the partner that benefits in a parasitic relationship |
| Relationship between algae and fungis in lichen | mutualism |
| relationship between remora and shark | commensalism |
| relationship between tape worm and human | parasitism |