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18 Cards in this Set

  • Front
  • Back
All of the changes that have transformed life over an immense time
Inhertied characteristic that improives an organism's ability to survive and reproduce in a particular environment
Descent with Modification
Species on Earth today descended from earlier species
Natural Selection
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
Fossil Record
Collection of fossils recorded in rock layers over time
Extinct Species
Species that no longer exist
Homologus Structures
Similar structures among related species
Vestigial Structures
Homologus structures that have a major function in one species but not in a related species
A group of individuals of the same species living in the same area at the same time
Differences among members of the same species
Artificial Selection
Selective breeding of plants and animals to produce offspring with traits that humans value
Gene Pool
Consists of all alleles, or different forms of genes, in all the individuals in a population
Generation-to-generation change in the frequencies of alleles within a population
Genetic Drift
Change in a gene pool due to chance
Gene Flow
Exchange of genes with another population
Contribution that an individual makes to the gene pool of the next generation
Drugs that kill or slow the growth of bacteria