evolution

4. selection organisms evolve traits useful to humans
8. time scale Division of Earth history into blocks of time distinguished by geologic
10. on how the organism’s genotype is expressed.
11. an act of describing or identifying something precisely
13. Traits often affects numerous species of organisms
17. develop from a fertilized egg.
18. Traits Feature passed to a new generation.
19. tree Diagram that shows how species are related to each other
20. process of adapting

1. person who studies human history
2. dating The origin of life
3. Darwin naturalist developed theory of evolution
5. left behind by a once-living organism.
6. speciation Evolution of a new species that occurs when some members of an original species
7. combination of alleles that an individual has
9. scientist who finds and studies fossils
12. selection organisms trait better enable adapt
14. speciation Evolution of a new species that occurs without geographic
15. structures Structure that evolution has reduced in size
16. Cell parts of our in green inheritance