Evolution Crossword

1. Feature passed from one generation to the next.
3. Evolution of a new species that occurs without geographic separation first occurring between members of an original species.
5. Procedure used to determine the age of rocks or fossils by measuring how much of the radioactive materials in each sample were broken down.
7. Process by which a new species evolves.
8. traits that organisms develop over a lifetime, such as strong muscles from working out
12. the first form of life; a simple celled organism
13. Process by which organisms with traits that better enable them to adapt to their environment will tend to survive and reproduce in greater numbers, causing beneficial heritable traits to become more common in a population.
14. Something left behind by a once-living organism. Fossils can be things like bones or footprints.
17. Scientist who finds and studies fossils to learn about evolution and understand the past.
19. Evolution of a new species that occurs when some members of an original species become geographically separated from the rest of the species.
20. Describes the combination of alleles that an individual has for a certain gene.

2. Trait that enhances an organism's ability to survive and reproduce in its environment.
4. English naturalist who developed the theory of evolution by natural selection.
6. Process in which organisms evolve traits useful to humans because people select which individuals are allowed to reproduce and pass on their genes to successive generations.
9. Characteristics of an organism that depend on how the organism’s genotype is expressed.
10. used to describe when events happened in the history of Earth.
11. Study of how organisms develop from a fertilized egg.
15. Structure that evolution has reduced in size because it is no longer utilized; examples include the human tailbone and appendix.
16. a person who studies human history and prehistory through the excavation of sites and the analysis of artifacts and other physical remains
18. it shows an organism's common ancestors, and shows how closely related they are.