Darwin's Theory

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Across
  1. 2. measure of relative contribution an individual trait makes
  2. 3. structures features not inherited from a common ancestor
  3. 4. structures reduced forms of functional structures
  4. 5. one species that evolves to resemble another species
  5. 6. study of the distribution of plants and animals
  6. 9. adaption that allows species to blend into their surroundings
  7. 11. traits primitive features
Down
  1. 1. traits newly evolved features
  2. 3. selection the development of new breeds and strains
  3. 7. cumulative changes in groups of organisms through time
  4. 8. structures structures inherited from a common ancestor
  5. 10. early, pre-birth stage of an organism's development
  6. 12. selection the modifying of a population