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19 Cards in this Set

  • Front
  • Back
The study of the fossile and culture remains and other evidence of humans extinct ancestors
Creation myth
a story describing the origins, usally supernatural, of the earth and life (including humans)
the older stone age; the earliest stage of stone tool making, that began about 2.5 million years ago
the new stone age; a late stage of stone tool making that began about 10,000 years ago
George Curier's theory that vast floods and other disadters wiped out ancient life forms again and again through out the earth's history
cumulate changes in the average characteristics of a population generally throught to occur over many generations
Charles Lyell's theory that the forces now affecting the earth-water and wind erosion, frost, volcanism-acted in a similar way in the past and that change is always gradual and nondirectional
Natural selection
the principle mechanism of Darwinian evolutionary change, by which the individuals best adabted to the enviroment contribute more offspring to succeeding generations than others do. As more of such individuals characteristtics are incorporated into the gene pool, the characteristics of the population evolve
members of the same species
Blending inheritance
an outmoded theory stating that offspring recieve a combination of all characteristics of each parent though the mixture of their bloods; superseded by Mendelian genetics
True breeding
the situation in which the members of a genetic strain resemble each other in all important charateristics and show little variability
in genetics, describes a trait that is expressed in the phenotype even when the organsim is carrying only one copy of the under lying heredity material
in genetics, descripes a trait that is expressed only when the organism is carrying two copies of the underlying hereditary material(two copies of the responsible gene)
(hereditary pairs) the observable characteristics of a plant or an animal; the expression of the genotype
(visible traits) the genetic makeup of a plant or animal; the total information contained in all genes of the organism
having identical versions of a gene for a particular trait
having different versions of a gene for a particular trait
generally, a spontaneous change in the chemistry of a gene that can alter its phenotypic effect. The accumlation of such changes may contribute to the evoluation of a new species of animal or plant
a large and genetically inherited change between parent and offspring