Unit 4 Vocab

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Across
  1. 1. structure / Structures that are similar in unrelated organisms
  2. 7. structure / Organs or skeletal elements of animals and organisms
  3. 8. isolation / A form of reproductive isolation that prevents two different species from interbreeding with one another
  4. 10. Drift / A change in the gene pool of a population
  5. 12. isolation / Prezygotic barrier that leads to speciation
  6. 14. / Ability of an organism to survive and reproduce in its environment
  7. 17. / Change in a kind of organism over time; process by which modern organisms have descended from ancient organisms.
  8. 19. isolation / Physical separation of a group of individuals from others of the same species
  9. 21. / A characteristic that improves an individual's ability to survive and reproduce in a particular environment
  10. 22. divergence / The process in which two or more populations of an ancestral species accumulate independent genetic changes through time
  11. 23. Selection / A natural process resulting in the evolution of organisms best adapted to the environment
Down
  1. 2. of the fittest / Process by which individuals that are better suited to their environment survive and reproduce most successfully
  2. 3. characteristic of the offspring
  3. 4. / Change in a DNA sequence that affects genetic information
  4. 5. / The preserved remains of traces of organisms that once lived on Earth
  5. 6. isolation / A form of reproductive isolation, wherein habitat preferences of species
  6. 9. selection / Selection by humans for breeding of useful traits from the natural variation among different organisms
  7. 11. structure / Structures that have no apparent function and appear to be residual parts from a past ancestor
  8. 13. / A term that typically describes a species that no longer has any know living individuals.
  9. 15. / The formation of new and distinct species in the course of evolution
  10. 16. isolation / Isolation between populations due to differences in courtship or mating behavior
  11. 18. the probability of mating
  12. 20. / A unit of heredity that is transferred from a parent to offspring and is held to determine