2nd Semester Final Review - Evolution

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Across
  1. 1. The fossil record consistent with the biological theory of evolution because it shows that Earth's organisms have _____ over time.
  2. 3. The fossil record supports the theory of evolution because it shows _____ changes over time.
  3. 5. Another way to describe natural selection is survival of the _____.
  4. 6. _____ selection is another term for selective breeding.
  5. 7. Selective breeding is performed by _____ to achieve desired traits, while natural selection occurs without _____ being involved.
  6. 9. _____ diversity describes the number of different kinds of genes present in a population.
  7. 11. Characteristics that are not beneficial to a species tend to _____ in frequency over time because the characteristics have a low survival rate.
  8. 14. In layers of rock, the oldest fossil would be found in the _____ layer.
  9. 16. Artificial selection and natural selection both result in changing traits in species over _____.
  10. 17. According to the theory of _____ through natural selection, organisms that survive are those that have adapted to the living conditions.
  11. 18. The fossil record is assembled by combining the data scientists learn from the fossils they study and allows scientists to develop a _____ showing the evolution of life from earlier species.
  12. 20. Charles Darwin's theory that evolution was caused by natural selection explains the sequential nature of groups in the fossil _____. The idea that earlier, simpler species have been replaced by later, more complex species explains the diversity of fossils.
  13. 21. Some species are able to survive major changes in the environment because they have variation within their _____, giving individuals an advantage for surviving change.
  14. 22. All adaptations are _____, but _____ are adaptations only if they help organisms survive.
  15. 23. Changes in DNA are known as _____ and can sometimes (not always) produce beneficial changes (adaptations) in populations.
Down
  1. 2. Lack of genetic variability prevents a species from adapting to environmental changes, making the species more prone to _____.
  2. 4. Antibiotic _____ occurs when variation in an initial population of bacteria leads to some bacteria surviving an antibiotic and reproducing while other bacteria die off.
  3. 8. Advantageous traits are likely to increase in future generations because individuals with the traits are more likely to _____, passing their genes onto their offspring.
  4. 10. Natural selection acts on a population to produce individual organisms with different adaptations. The usefulness of these adaptations is tested by interactions in the surrounding _____.
  5. 12. Natural selection is typically a gradual process, but can operate extremely rapidly to develop advantageous traits in populations that are facing a change in _____ conditions.
  6. 13. selection, _____ favors the survival of individuals that produce the most reproductively viable young that have adaptive characteristics and can themselves reproduce.
  7. 14. _____ refers to the existence of a wide range of different types of organisms in a given place at the same time.
  8. 15. A disadvantage of selective breeding is that it can reduce genetic _____.
  9. 19. According to the theory of natural selection, the ability of individuals to _____ to their environment makes them more likely than others to survive and reproduce.