Bio Ch 17 2
Terms
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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.