Across
- 5. the formation of a new species
- 6. process in which organisms adapt to environmental change
- 11. cause organisms to die e.g. through lack of food
- 14. genes being passed onto offspring
- 15. allows a population to adapt to a changing environment
Down
- 1. a barrier which physically separates living things e.g. a mountain
- 2. the different versions of a gene
- 3. characteristic which allows an organism to survive within its habitat
- 4. a barrier such as different habitats
- 7. natural selection leads to this
- 8. spontaneous, random change to DNA
- 9. an environmental factor which can increase mutation rate
- 10. a barrier such as different mating rituals
- 12. produced by members of the same species when they breed
- 13. the individuals best-adapted to the environment