Across
- 5. when two or more species reproduce at different times
- 8. features of an organism that are considered to have lost much of their original function through evolution
- 9. the preserved remains of plants and animals
- 10. a heritable trait that helps an organisms fitness
- 13. how reproductively successful an organism is
- 14. the disappearance of a species from Earth
- 15. habitat preferences of species lowers the probability of mating
- 16. Biological evolution that happens by chance
- 17. The process where traits that improve an organisms chances for survival mostly get passed on
- 19. only the individuals most adapted to the environment will survive
- 20. a change in DNA
- 21. a sequence of DNA that codes for a specific trait
Down
- 1. physical features of different species that are similar in function but not necessarily in structure. They come from different ancestors
- 2. physical features that organisms have that are similar since they share a common ancestor, but the features have different functions
- 3. a physical incompatibility between reproductive organs of two organisms
- 4. describes the physical separation of different populations due to geographical barriers
- 6. the development of different behavioral practices between two groups of organisms
- 7. Two or more populations of an ancestral species accumulate independent genetic changes through time
- 11. when a new species is generated
- 12. when humans pick the traits that get passed on with an organism
- 18. a change over time