all of the changes that have transformed life over an immense time
an inherited characteristic that improves and organism's ability to survive and reproduce in a particular evronment
the process by which individuals with inherited characteristics well-suited to the environment leave more offspring on average than do other individuals
preserved remains or markings left by organisms that lived in the past
the collection of fossils recorded in rock layers over time
species that no longer exist
similar structures found in different organisms with a common ancestor
homologous structures that have a major function in one species but not in a related species
Descent with Modification
populations change over time
group of individuals of the same species
differences among members of the same species
selective breeding has resulted in many different types of domestic plants and animals, in a relatively short time
changes in the frequency of various genes in the gene pool
all of the genes of all of the individuals in a population
changes in the gene pool. Small changes over relatively short periods of time
populations that do not undergo change to their gene pools are not presently evolving
drugs that kill or slow the growth of bacteria
changes in the frequencies of genes in a small population caused by chance
changes in the gene pool caused by a rapid reduction in population size. Reduces genetic variability
changes that occur in a small population that populates a new environment
addition of new genes to the gene pool by migration
creation of new genes by changing DNA. Increases genetic variation
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