Natural Selection

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Across
  1. 3. the phenotype is the set of observable characteristics or traits of an organism.
  2. 6. the biggest shark in the world, but one of the largest fish ever to exist.
  3. 7. a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.
  4. 9. process that fits organisms to their environment, enhancing their evolutionary fitness.
  5. 10. the chance disappearance of particular genes as individuals die or do not reproduce.
  6. 11. the genetic constitution of an individual organism.
Down
  1. 1. the transfer of genetic material from one population to another
  2. 2. Genetic variation is the difference in DNA among individuals or the differences between populations.
  3. 4. a group of individuals of the same species living and interbreeding within a given area.
  4. 5. a group of organisms that can reproduce with one another in nature and produce fertile offspring.
  5. 8. a specific characteristic of an organism.