Evolution/Natural Selection

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Across
  1. 8. the random differences in traits among individuals in a certain species
  2. 12. the theory of how prokaryotes evolved into eukaryotes
  3. 13. a trait that gives an organism an advantage which helps it to survive
  4. 14. these were the first organisms
Down
  1. 1. this cell structure is believed to have been a living prokaryotic cell
  2. 2. every organism produces more offspring than can possibly survive
  3. 3. changes in the DNA sequence of an organism that occur during DNA replication
  4. 4. the movement of alleles from one population to another
  5. 5. scientific theory that organic molecules evolved from nonliving matter through a series of chemical reactions
  6. 6. naturalist that journeyed around the world making observations that led to the theory of evolution
  7. 7. branching tree diagram that shows ancestral relationships among organisms
  8. 9. the evolutionary process where new species comes from a single ancestral species
  9. 10. ancestor that is shared by different species
  10. 11. changes in allele frequencies due to chance