Anthology Chapter 2

3. Darwin and ______ developed the theory of evolution through natural selection.
5. ______ drift is the fourth cause of evolution, is random change in the frequency of alleles-- that is, of the different forms of a gene.
8. ______ flow is the third cause of evolution, is the diffusion, or spread, of new genetic material from one population to another of the same species.
9. Darwin believed that each body part contained invisible particles called ______.
11. the second cause of evolution: a random change in a gene or chromosome.
12. the doctrine asserting that cataclysmic events rather than evolutionary processes are responsible for geologic changes throughout earths history.
14. The process of adaptive _____ : out of one species branch multiple closely related species.
16. He theorized that population size was limited by food supply.

1. He developed an early theory of evolution involving the inheritance of acquired characteristics. which was wrong.
2. The genetic makeup of an organism.
4. the natural processes operating today are the same as the natural processes that operated in the past.
6. the physical expression of the genotype.
7. physical remains of part or all of once living organisms.
10. the theory of evolution through the inheritance of acquired characteristics in which an organism can pass on features acquired during its lifetime.
13. He wrote a book titled "the origin of species".
15. One or more alternative forms of a gene.