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Bosch- Ch. 7

adaptation characteristic that helps an organism survive and reproduce in its environment
Examples of adaptations structures and behaviors for finding food, for protection and for moving from place to place
species group of organisms that can mate with one another to produce fertile offspring
evolution process by which populations accumulate inhertited changes over time
fossils the solidified remains or imprints of once-living organisms found in layers of rock and soil
fossil record supplies evidence about the order in which evolutionary changes occurred
conditions necessary for fossils to form organism buried in fine sediment and oxygen cannot be present
vestigial structures remnants of once-useful structures such as hind limbs in modern whales
List 4 geological time scales or eras Precambrian, Paleozoic, Mesozoic, Cenozoic
Stages of sedimentary rock cycle weathering of preexisting rock, erosion, deposition, and compaction and cementation of sediment, sedimentary rock is formed
Charles Darwin Theory of Evolution
Selective breeding farmers choose certain traits and breed only the individuals with the desired traits
Natural selection the process by which organisms with desired traits survive at a higher rate than organisms without the favorable traits
traits distinguishing qualities
Steps of natural selection Overproduction, genetic variation, struggle to survive, successful reproduction
overproduction each species produces more offspring than will survive to maturity
genetic variation individuals in a population have a unique combination of traits. Some will increase the chances the individual will survive and other traits decrease the chance of survival
struggle to survive a natural environment does not have the food, water and resources for all to survive. Some are killed by other organisms
successful reproduction individuals that are well adapted to their environment are more likely to survive
mutation changes in a gene that cause variations in a species
generation time the period between the birth of one generation and the birth of the next generation
Describe the changes in the peppered moth Dark peppered moths were easy to see on gray trees in the 1850s. After 1850 soot blackened the trees, and the pale peppered moths became easy prey
speciation process by which two populations can of the same species become so different that they can no longer interbreed
Created by: seagullq