Across
- 2. a group where organisms share enough DNA
- 4. hybrid offspring dies
- 6. levels of organization into which organisms are classified
- 12. species occur in different habitats
- 15. the branch of biology that groups and names organisms
- 17. process where organisms change over time
- 18. where an organism moves to a new area
- 19. Drift a random event removes genetic variation from a population
- 20. the process by which humans use breeding for specific traits
Down
- 1. each reproduces at a different time
- 3. changes in organisms that result in the creation of a new species
- 5. occurs gradually
- 7. reproductive isolation that keeps a sperm from fertilizing an egg
- 8. the preserved remains of impression of an organism
- 9. a diagram that links groups of organisms by showing how evolutionary lines branched off from common ancestors.
- 10. hybrid is sterile
- 11. gametes that meet do not fuse to form a zygote
- 13. grouping things into levels based upon similarities
- 14. an organism exits an area
- 16. when a new population is started by a small number of organisms