Ch. 14 Evolution

24298592	Evolution	all of the changes that have transformed life over an immense time
24298593	Adaptation	an inherited characteristic that improves and organism's ability to survive and reproduce in a particular evronment
24298594	Natural Section	the process by which individuals with inherited characteristics well-suited to the environment leave more offspring on average than do other individuals
24298595	Fossils	preserved remains or markings left by organisms that lived in the past
24298596	Fossil record	the collection of fossils recorded in rock layers over time
24298597	Extinct	species that no longer exist
24298598	homologous Structures	similar structures found in different organisms with a common ancestor
24298599	Vestigial Structures	homologous structures that have a major function in one species but not in a related species
24298600	Descent with Modification	populations change over time
24298601	Population	group of individuals of the same species
24298602	Variation	differences among members of the same species
24298603	Artificial Selection	selective breeding has resulted in many different types of domestic plants and animals, in a relatively short time
24298604	Population Genetics	changes in the frequency of various genes in the gene pool
24298605	Gene Pool	all of the genes of all of the individuals in a population
24298606	Microevolution	changes in the gene pool. Small changes over relatively short periods of time
24298607	Hardy-Weinberg Equilibrium	populations that do not undergo change to their gene pools are not presently evolving
24298608	Antibiotics	drugs that kill or slow the growth of bacteria
24298609	Genetic Drift	changes in the frequencies of genes in a small population caused by chance
24298610	Bottleneck Effect	changes in the gene pool caused by a rapid reduction in population size. Reduces genetic variability
24298611	Founder Effect	changes that occur in a small population that populates a new environment
24298612	Gene Flow	addition of new genes to the gene pool by migration
24298613	Mutation	creation of new genes by changing DNA. Increases genetic variation