Across
- 3. a random change in the nucleotide base sequence of a gene or DNA molecule
- 7. overproduction inherited variation struggle to survive successful reproduction
- 8. the overall group of organisms
Down
- 1. a small difference between individuals of the same species
- 2. a type of bird that has different shaped beaks
- 4. all ___ come from variations, but only the ones that help
- 5. ability to survive and reproduce
- 6. the change of a population over time