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Biology Week 3 Vocabulary: Evolution 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Across Down 2. the preserved remains or trace of an organism that lived in the past 1. an organism's ability to survive and reproduce within a given environment 4. a group of organisms with similar characteristics that can breed with one another to produce fertile offspring. 7. the introduction of genes from one population into the gene pool of another population 9. an advantageous trait an organism has for its environment 13. the idea that evolution occurs in spurts of rapid change 14. the process by which species change over time 3. selection the process by which organisms with favorable variations for their environment survive, reproduce, and pass on those variations to the next generation 5. the evolution of a new species from an existing species 6. the idea that evolutionary change occurs slowly and steadily over long periods of time 8. the extinction of huge numbers of species in a fairly short time period 10. the permanent loss of a species 11. isolation an inability of organisms to interbreed due to geographic barriers 12. the combined genetic information of all members of a population