Across
- 2. form of a gene
- 3. diversity variations of genes and genotypes
- 7. how something operates
- 8. study of the earth and its land
- 9. slowly and consistently
- 11. a trait to help an organism survive
- 12. someone in previous generations
Down
- 1. to change
- 2. sudden or not expecting
- 4. diagram that shows how related organisms are
- 5. early stage of development, like an egg
- 6. group of organisms from the same species
- 7. change in dna
- 10. physical structure of living things