Across
- 2. To change overtime
- 4. a heritable trait that increases an individuals fitness
- 6. structure that has the same function but different construction and was not inherited from a common ancestor
- 9. the preserved remains or trace of organisms that once lived on earth
- 13. The process by which traits that improve an organisms chances for survival and reproduction are passed on more frequently to future generations than those that do not
- 14. the accumulation of differences between species or populations
- 15. a sequence of DNA that codes for a particular trait
- 16. changes in DNA that can give rise to genetic variations among individuals
- 18. structures in different species that are similar because of common ancestry
- 19. the process of selection conducted under human direction
- 20. isolation where in habitat preferences of species lowers the probability of mating
Down
- 1. An individual with high fitness, such as our striped fish, produce more offspring and therefore passes on its genes more frequently than an individual with low fitness
- 3. structure that is inherited from ancestors but has lost much or all of its original function
- 5. the disappearance of a species from earth
- 7. the process by which new species are generated
- 8. physical separation of a group of individuals from others of the same species
- 9. how reproductively successful an individuals fitness is in its environment
- 10. isolation between populations due to differences in courtship or mating behavior
- 11. a physical incompatibility between reproductive organs of two organisms
- 12. isolation among sexual organisms in which differences in the timing of critical reproductive events prevent members of closely related species
- 17. Biological evolution that occurs by chance