Across
- 3. natural variation among organisms that make them best adapted to their environment live and reproduce, therefore passing on to their offspring the genetic qualities best suited to that environment
- 6. characteristics of a species change over many generations in response to the environment
- 8. group of organisms that share similar characteristics and can mate with each other to produce offspring
- 9. change in the characteristics of a species over several generations
- 10. change in the nucleotide sequence of an organism's genome
Down
- 1. the permanent loss of a population or species
- 2. range of differences in DNA among organisms
- 4. The theory that evolution occurs slowly but steadily
- 5. individuals that are best adapted to the environment will survive and reproduce; those traits that help them, become more common in a species and maladaptive traits die out.
- 7. bodily structure of an organism or of any of its parts