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27 Cards in this Set

  • Front
  • Back
warning coloration
the colors of the animal actually make it easier to see
Darwin's theory of evo. in which new species arise through gradual changes
reproductive isolation
the loss of the ability to interbreed by two isolated groups
Synthetic Theory
A modern theory of evolution stating that populations evolve, rather than the indivisuals within populations
adaptive radiation
the process by which a species evolves into a number of different species, each occupying a new environment
Any kind of inherited trait that improves the chances of survival and reproduction for an organism
directional selection
one type of natural selection, in which an extreme phenotype becomes a favorable adaption
Characteristics in indivisual that differ from typical characteristics of other indivisuals in the same species
genetic drift
a change in the gene pool of a small population that is brought about by chance
Natural Selection
The process whereby organisms with favorable variations survive and produce more offspring than less well adapted organisms
industrial melanism
the development of dark-colored organisms in a population exposed to industrial air pollution
The simplest groupings of organisms in nature
disruptive selection
two opposite phenotypes are favorable adaptions, while the average phenotypes are unfavorable
genetic recombination
The formation of a new combinations of allels during sexual reproduction
stabilizing selection
sometimes, the average phenoltype may be a favorable adaptions, and extremely phenotypes are unfavorable
punctuated equilibrium
The theory of evolution stating that a species remains the same for a long time
one organism is protected from its enemies by its resemblance to another species
The formation of new species
convergent evolution
natural selection that causes unrelated species to resemble one another
gene pool
The total of the alles in a population
genetic equilibrium
The condition in which allele frequencies do not change from one generation to the next
geographic isolation
occurs when a population is divided by a natural barrier, such as a mountain desert, river or other body or water, or a landslide
two or more species also can evolve in response to each other through cooperative or competitive adaptions
Hardy-Weinberg las
sexual reproduction alone does not affect genetic equilibrium
one organism is protected from its enemies by its resemblance to another species
the organism blends into the environment
each species is found in a particular region of the earth. This regions is calle the species' range