Evoltion

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Across
  1. 2. Time for radioactive decay in a sample decay
  2. 3. selection when organisms at one end have higher fitness
  3. 5. evolve separately to perform a similar function
  4. 7. selection that means 2 different species
  5. 8. group of individuals of the same species
  6. 9. Survival of the fittest
  7. 12. structures with no real purpose
  8. 16. isolation that occurs when 2 pop. are separated
  9. 17. stage of animal development with a backbone
Down
  1. 1. age of fossil s determined by other fossil ages
  2. 4. animals in the middle of the curb have higher fitness
  3. 6. Who made natural selection
  4. 10. a change in the sequence of DNA
  5. 11. physical evidence of evolution
  6. 13. changes in the inherited characteristics
  7. 14. diagram that shows evolutionary relationship among species
  8. 15. transfer of alleles from one pop. to another