An association of individuals of different species living in the same habitat and having functional interactions is known as:
| 1. | Ecological niche | 2. | Biotic community |
| 3. | Ecosystem | 4. | Population |
Niche overlap indicates:
| 1. | active cooperation between two species |
| 2. | two different parasites on the same host |
| 3. | sharing of one or more resources between the two species |
| 4. | mutualism between two species |