Across
- 3. living things in an ecosystem
- 4. the extermination of a species
- 5. diagram that shows the relation ship between different species
- 6. the ability for an organism to reproduce
- 7. random event that cause the frequencies of genes to change
Down
- 1. nonliving things in an ecosystem
- 2. reduction in gene variability when a small group separates from the larger group