Bio Choice Board Unit 7

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Across
  1. 4. Natural selection that favors intermediate variants by acting against extreme phenotypes
  2. 8. A technique used to determine the actual age of a fossil on the basis of the amount of a radioactive element it contains
  3. 9. the act of concealing the identity of something by modifying its appearance
  4. 10. Any difference between individuals of the same species.
  5. 12. of an animal to look like another more harmful animal
  6. 13. drift
  7. 14. A trait that helps an organism survive and reproduce
  8. 16. mimicry
  9. 18. form of reproductive isolation in which two populations are separated physically by geographic barriers such as rivers, mountains, or stretches of water
  10. 19. process in which a large population declines in number, then rebounds
  11. 20. Form of reproductive isolation in which two populations have differences in courtship rituals or other types of behavior that prevent them from interbreeding
  12. 22. Number of times that an allele occurs in a gene pool compared with the number of alleles in that pool for the same gene
Down
  1. 1. not developed
  2. 2. form of natural selection in which a single curve splits into two; occurs when individuals at the upper and lower ends of a distribution curve have higher fitness than individuals near the middle
  3. 3. A group of individuals that belong to the same species and live in the same area
  4. 5. change in allele frequencies as a result of the migration of a small subgroup of a population
  5. 6. A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.
  6. 7. form of reproductive isolation in which two populations reproduce at different times
  7. 11. Ability of an organism to survive and reproduce in its environment
  8. 15. Form of natural selection in which the entire curve moves; occurs when individuals at one end of a distribution curve have higher fitness than individuals in the middle or at the other end of the curve
  9. 17. Ability of an animal to look like another more harmful animal
  10. 21. Combined genetic information of all the members of a particular population