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