A. A type of human-controlled breeding to increase the frequency of desired traits. X B. This process proposes that species arise, change, and become extinct due to natural, not supernatural forces. X C. Chemical modifications to the DNA that occur in one generation may be passed on to later generations. X D. Any evolved trait that helps an organism be more suited to its environment (turtles, manatees, and penguins have all flippers). X E. Anatomical structures fully functional in one group and reduced or nonfunctional in another. X F. Same function and same basic structure, indicating a common ancestor. X G. Same basic function but different groups. X H. Study of the range and distribution of species throughout the world. X I. Death of every member of species. X J. Are remains and traces of past life or any other direct evidence of past life. X K. Radioactive dating techniques used to assign an actual date to a fossil. X L. Determines the relative order of fossils and strata but not the actual date. X M. All genes together. X N.
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