Natural selection

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Across
  1. 2. a characteristic that all members of a species have
  2. 6. a trait that makes it more likely for an individual to survive
  3. 8. a result or change that happens because of an event or process
  4. 10. the number of individuals with each trait in a population
Down
  1. 1. a long piece of DNA that contains many genes
  2. 3. a related organism from a previous generation
  3. 4. everything (living and non-living) that surrounds an organism
  4. 5. an individual life form
  5. 7. a type of molecule that genes and chromosomes are made of
  6. 9. an event or process that leads to a result or change