Across
- 2. physical rather than biological
- 5. living or once living components of a community
- 8. the number of people per unit of area
- 9. branching tree of ancestral relationships of organisms
- 10. Branch of biology that deals with relations of organisms
Down
- 1. the system of nomenclature
- 3. number of organisms in a region that can be supported
- 4. region of the surface/atmosphere
- 6. Changes food into energy
- 7. types of living things with its interactions