| A | B |
| Population | A group of organisms of one kind that live in one location. |
| Community | A group of populations that live together. |
| Competition | A kind of contest among populations that need to get a certain amount of food, water,and shelter to survive. |
| Adaptation | A trait or characteristic that helps an organism survive |
| Symbiosis | A relationship between different kinds of organisms |
| Predator | An animal that kills and eats other animals |
| Prey | An animal that is eaten by a predator |
| Three kinds of Symbiosis | Mutualism, Commensalism,Parasitism |
| Parasitism | Kind of symbiosis in which ,one organism benefits but the other is harmed. |
| Mutualism | Kind of symbiosis, in which both organisms are benefit. |
| Commensalism | Kind of symbiosis in which only one organism benefits and the other isn't affected. |
| Parasite | The organism that benefits in the kind of symbiosis called Parasitism. |
| Host | The organism that is harmed in the kind of symbiosis called Parasitism. |