Across
- 4. the environment determines who survives and reproduces
- 7. the random recombining of genes during meiosis and fertilization
- 8. all individuals of a species die
- 9. more offspring than the environment can support
- 13. changes in an organism that happen over time
Down
- 1. humans determine which organisms reproduce
- 2. a random change in the DNA sequence
- 3. changes in form or color within a species
- 5. an idea that has been tested and proven correct
- 6. structures made from similar structures but used for different purposes
- 10. Remains of a living organism preserved in stone
- 11. structures perform the same function but have different structures
- 12. anatomical feature that no longer has a purpose