| A | B |
| capacity | largest number of individuals of one species that an ecosystem can support |
| ecology | study of interactions that occur among organisms and their environment |
| limiting factor | anything that restricts the number of individuals in a population |
| symbiosis | any close relationship between species |
| decomposer | nature recyclers |
| food chain | a model of the feeding relationship among organisms in an ecosystem |
| herbivore | eat producers |
| omnivore | eat producers and consumers |
| carnivore | eat consumers |
| producers | use the energy in sunlight to make their own food |