Unit 4: Evolution and Natural Selection Vocabulary

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