Unit 3: Evolution

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Across
  1. 5. the formation of a new species
  2. 6. process in which organisms adapt to environmental change
  3. 11. cause organisms to die e.g. through lack of food
  4. 14. genes being passed onto offspring
  5. 15. allows a population to adapt to a changing environment
Down
  1. 1. a barrier which physically separates living things e.g. a mountain
  2. 2. the different versions of a gene
  3. 3. characteristic which allows an organism to survive within its habitat
  4. 4. a barrier such as different habitats
  5. 7. natural selection leads to this
  6. 8. spontaneous, random change to DNA
  7. 9. an environmental factor which can increase mutation rate
  8. 10. a barrier such as different mating rituals
  9. 12. produced by members of the same species when they breed
  10. 13. the individuals best-adapted to the environment