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Evolution & Extincti

QuestionAnswer
single living thing organism
classification of organisms whose members can interbreed and produce fertile offspring species
group of indiviuals within a species that live within the same geographical area population
mixing of genetic material sexual reproduction
accidental changes in DNA mutations
process that favors certain inhertied characteristics over others; depends on the environment; selection acts on genetic variation natural selection
natural selection that favors norm and selects against extremes stabilizing selection
natural selection that favors a paricutlar extreme trait directional selection
favors both ends of extreme traits as opposed to one singular norm disruptive selection
population changes over multiple generations as genertic changes alter their physical & behavioral characteristics evolution
traits of those individuals that survive and reproduce will become more common in a population adaptation
a special type of natural selection where two species provided the slective pressure determine which traits are passed down coevolution
closley related specieis living in different environments tend to diverge their traits; different selective pressure = different adaptations divergent evolution
unrelated species living in similar enviroments in separate locations may independently acquire similar traits; similar selective pressure convergent evolution
humans conducted selection under own direction; domesticated dogs, cats, and livestocks artificial selection
change in traits in a population due to random chance events; small populations are more likely over large populations because offsprings with lucky genes will have a greater impact on gene frequency of the next generation genetic drift
when population size drastically reduces; loss of genetric variants and resulting in less diverse populations (disasters, predators) bottleneck effect
reduce population size and less availible allels; when a smaller group of larger population isolates resulting in missing traits of the original trait founder effect
when a population becomes physically separated by geopgrahical distance; when a mutation occurs in when of the population, it doesnt spread to the other; eventually grow so different that they can no longer mate allopatric speciation
dissappeared species; when the environment changes more rapidly than the species can adapt; smaller and narrowly specialized populations are most vulnerable extinction
Created by: jbearden582
 

 



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