Evolution

4. A group of organisms that can successfully interbreed and produce viable, fertile offspring
5. The ultimate source of variation
6. Elimination of a species
7. A change in gene frequency over time where beneficial traits are becoming more common is known as descent with __________
9. English naturalist who went on a voyage to the Galapagos Islands and noticed that different species of animals that lived on different islands had specific characteristics for that island
12. A measure of how well you can survive in your environment
14. Occurs when two populations of organisms form a specialized relationship and thus change in response to each other
16. Slow, constant changes over a long period of time
17. organisms with the "best" traits (adaptations) will live longer and reproduce more than others, causing changes in the population over time by acting on traits that are heritable
19. Evolution occuring on a small scale affecting a single population
20. A number of different species arising from one common ancestor is known as __________ evolution
21. A type of divergent evolution occurring on a small scale over a shorter period of time is known as adaptive __________

1. Lots of offspring and limited resources causes competition is known as __________ of offspring
2. Evolution occuring on a large scale affecting changes in species across populations
3. Forming of a new species by evolution from a pre-existing species
8. A feature that allows an organism to better survive in its environment
10. Bursts of change followed by periods of stability is known as punctuated __________
11. Individuals do not evolve, __________ do!
13. The combined alleles of all individuals in a population
15. Differences in the physical traits of organisms
18. When unrelated species evolve similar characteristics because they live in similar environments, it is know as __________ evolution