Across
- 2. A mutation/change to help something survive in its environment
- 6. The amount of people or organisms in a specific area
- 9. Something that there are too many of.
- 10. Something that is not living
- 12. Selection of genes by nature
- 13. Something that is physically fit.
- 15. The changes of an organism through time to help it adapt to the world around it.
- 16. Breeding something to get a select set of genes.
- 17. Where an organism lives.
- 18. Breeding two things of the same species together
Down
- 1. A trait that promotes a creature’s success in its environment
- 3. The activity of competing for something
- 4. Selection of genes chosen artificially
- 5. A characteristic of an organism.
- 7. Something that is living
- 8. The idea that only the strongest or smartest survive
- 11. A unit of grouping of things by date of birth.
- 14. A way to classify animals