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15 Cards in this Set

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evolution
accumulation of inherited changes w/in pop. over time.
pop.
group of individuals of one species that live in the same geographical area at the same time.
species
group of organisms with similiar structure, function and behavior, that are capable of breeding with one another.
Lamark's theory of acquired characteristics
organims pass traits the acquired during their lifetims to their offspring.
artificial selection
process by which humans breed plants or animals to develop new varieties.
Malthus & 'struggle for existence"
populations have the capactity to outstrip the food supply. there would be a struggle for food.
adaptation
evolutionary modification t at improves the chances of survival and reproductive success in an environment.
Variation
the individuals in a pop. exhibit variation in thier traits
overproduction
each species has the capacity to produce more offspring than will survive to maturity
differential reproductive success
survival of the fittest
fossil
remains left in sedimentary rock by previously existing organisms
radioisotopes
radioactive isotopes. allows measurement of age.
homologous features
same structure in a comon ancestor
ex: same structure diff function
homoplastic features
similar functions but not similar structures
biogeography
study of past and present geographical distr.