Across
- 2. isolation The physical separation of members of a population
- 4. A sequenced of DNA that codes for a particular trait
- 5. selection The process of selection conducted under human direction
- 6. drift Biological evolution
- 10. A heritable trait that increases an individual’s fitness’
- 11. isolation Occurs when mismatches in mating traits (signals and/or preferences)prevent mating between two species/populations
- 13. The complete disappearance of a species from Earth
- 15. selection The process by which traits that improve an organisms chances for survival and reproduction are passed on more frequently to future enervations than those that do not
- 16. Changes in DNA
- 17. structure Similar physical features in organisms that share a common ancestor, but the features serve completely different functions
- 20. isolation A pre-mating isolating mechanism in which members of different species seldom, if ever, meet because each species prefer to live (is adapted to) different habitats
- 21. structure Features of different species that are similar in function but not necessarily in structure and which do not derive from a common ancestral feature
Down
- 1. divergence The development of dissimilar traits or features
- 3. isolation A type of reproductive isolation where two species physically cannot undergo fertilization
- 7. The formation of a new and distinct species in the course of evolution
- 8. The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock
- 9. structure Structures that have no apparent function and appear to be residual parts for a past ancestor
- 12. Change over time
- 14. isolation When two or more species reproduce at different times
- 18. of the fittest The continued existence of organisms which are best adapted to their environment
- 19. Describes how reproductively successful an organism is in its environment