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evolution Flashcards

evolution

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85224084microevolutionevolution resulting from small specific genetic changes that can lead to a new subspecies
85224085microevolutionis how new species are formed
85224086microevolutionA change in the gene pool of a population from generation to generation.
85224087macroevolutionlarge-scale evolutionary changes that take place over long periods of time
85224088macroevolutionthe patterns that determine phylogeny
85224089phylogeny(biology) the sequence of events involved in the evolutionary development of a species or taxonomic group of organisms
85224090lamarckproposed that by selective use or disuse of organs, organisms acquired or lost certain traits during their lifetime. These traits could then be passed on to their offspring. Over time, this process led to change in a species
85224091natural selectionprocess by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest
85224092neo darwinism/modern synthesisincorporating the idea of genetics
85224093evidence for evolutionPaleontology:fossil record, Biogeography:geographical distribution of species (species from different places seem to have the same traits), comparative anatomy:analogous structures and homologous structures.embryology: Similar in ontogeny, molecular biology similar genes in related species.
85224094Paleontologythe earth science that studies fossil organisms and related remains evidence
85224095biogeographydealing with the geographical distribution of animals and plants, shows species that have no genetic relation that live in similar areas have similar development. evidence
85224096embryologythe branch of biology that studies the formation and early development of living organisms, many related species have similar development :evidence
85224097comparative anatomythe study of anatomical features of animals of different species: evidence
85224098molecular biologyThe study of sequence data (nucleotides, peptides) for common biological molecules such as DNA, RNA, and ribosomal proteins and how these sequences differ among species evidence
85224099evidence for natural selectionpopulations have enormous amount of reproduction potential. This potential is much larger than the environment can support
85224100evidence for natural selectionPopulations reproduce in greater number than the resources can support. As a result species compete for the limited resources.
85224101evidence for natural selectionspecies are in competition for limited resorces and they compete for survival
85224102evidence for natural selectionThere is genetic variation between the individuals competing for limited resources.
85224103evidence for natural selectionThe individuals are competing for limited resources,they have genetic variation between them which gives some individuals an advatage over others. This variation is inheritable.
85224104evidence for natural selectionThe genetic variation is inheritable and only the individuals that have the prefered gene reproduce and pass on there phenotypes
85224105evidence for natural selectionenormous reproduction potential is greater than the environments ability to support all offspring. Individuals with inheitable genetic variation are in competition with each other over the limited resorces. only the fit survive and pass on genotypes and over time these prefered genes accumulate in the environment.
85224106stabilizing selectionNatural selection that favors intermediate variants by acting against extreme phenotypes
85224107directional selectionoccurs when natural selection favors one of the extreme variations of a trait
85224108disruptive selectionnatural selection that favors individuals with either extreme of a trait
85224109sexual selectionA form of natural selection in which individuals with certain inherited characteristics are more likely than other individuals to obtain mates.
85224110artifical selectionselection by humans for breeding of useful traits from natural variation among different organisms
85224111mutationsRandom errors in gene replication that lead to a change in the sequence of nucleotides; the source of all genetic diversity
85224112sexual reproductionA type of reproduction in which two parents give rise to offspring that have unique combinations of genes inherited from the gametes of the two parents.crossing over,independent assortment of homologues,random joining of gametes
85224113crossing overexchange of genetic material between homologous chromosomes during prophase I of meiosis
85224114independent assortment of homologuescreates daughter cells during metaphase I with random combinations of maternal and paternal chromosomes
85224115random joining of gametescontributes to the diversity of gene combinations in the zygote during fertilization
85224116diploidyrecessive alleles remain in the gene pool because latent variation is exposed to natural selection only when both parents carry rexessive allele the same creates variation
85224117gene flowmovement of alleles into or out of a population due to the migration of individuals to or emigration from the population
85224118genetic driftrandom change in allele frequencies that occurs in small populations
85224119founder effectrandom change in the gene pool that occurs in a small colony of a population
85224120bottleneckgenetic drift resulting from a drastic reduction in population size
85224121hardy weinbergallele frequencies will be stable over the generations if there is no mutation, the population is infinitely large and isolated from other populations of the same species, mating is random, and all individuals reproduce equally and randomly
85224122p+qallele frequency for both alleles
85224123p^2frequency of homozygous dominants
85224124q^2frequency of homozygous recessive individuals
852241252pqFrequency of heterozygous individuals
85224126hardy weinbergp+q=1 and p^2+2pq+q^2=1
85224127allopatric speciationThe formation of new species in populations that are geographically isolated from one another.
85224128sympatric speciationoccurs when two subpopulations become reproductively isolated within the same geographic area
85224129adaptive radiationthe evolution of many diversely adapted species from a common ancestor upon introduction to various new environmental opportunities and challenges
85224130sympatric speciationmode of speciation occurring as a result of a radical change in the genome of a subpopulation, reproductively isolating the subpopulation from the parent population
85224131allopatric speciationgeographic isolation isolates gene pools, each gene pool is affected by a different environment and different selection mechanisms
85224132adaptive radiationevolution where one organism gives rise to a number of variations that are suited to different environments
85224133speciesa group of organisms so similar to one another that they can breed and produce fertile offspring
85224134habitat isolationtwo species that occupy different habitats within the same area may encounter each other rarely, if at all, even though they are not isolated by obvious physical barriers such as mountain ranges
85224135temporal isolationtype of reproductive isolation in which two organisms reproduce at different times
85224136behavioral isolationtype of reproductive isolation in which two organisms have different mating rituals that prevent them from interbreeding
85224137mechanical isolationanother barrier to mating results from physical incompatibility between sexual organs of two different individuals.
85224138gametic isolationsperm does not recognize egg or can't survive in other species enviroment
85224139hybrid inviabilityA postzygotic barrier in which hybrid zygotes fail to develop or to reach sexual maturity
85224140hybrid sterilityA type of postzygotic barrier between species; the species remain isolated because hybrids fail to produce functional gametes.
85224141hybrid breakdownA postzygotic barrier in which offspring of hybrids are weak or infertile
85224142divergent evolutionwhen two or more species sharing a common ancestor become more different over time
85224143divergent evolutionA form of evolution in which the same organism is placed into different environments with different selection pressures. This causes organisms to evolve differently, to diverge from their common ancestor. The resulting (new) species may share structural (but not necessarily functional) similarity; divergent evolution produces homologous structures.
85224144homologous structurescome from divergent evolution
85224145convergent evolutionprocess by which unrelated organisms independently evolve similarities when adapting to similar environments
85224146analogous structurescome from convergent evolution
85224147parallel evolutiontwo related species (common ancestor) independantly evolve similar structures
85224148parallel evolutionTwo related species that have made similar evolutionary adaptations after their divergence from a common ancestor
85224149coevolutionThe mutual evolutionary influence between two different species interacting with each other and reciprocally influencing each other's adaptations.
85224150coevolutionthe process in which species exert selective pressure on each other
85224151macroevolutionEvolutionary change above the species level, including the origin of a new group of organisms or a shift in the broad pattern of evolutionary change over a long period of time.
85224152phyletic gradualismslow steady change in a phylum with a steady accumulation of small changes
85224153phyletic gradualismspecies continue to adapt to new challenges over the course of their history, gradually becoming new species; evolution of populations at a slow and smooth rate
85224154punctuated equilibriuma theory of evolution holding that evolutionary change in the fossil record came in fits and starts rather than in a steady process of slow change
85224155punctuated equilibriumin evolutionary theory, long periods of apparent stasis (no change) interrupted by relatively brief periods of sudden change
85224156origin of lifesometime between 3.5 and 3.8 billion years ago, first primitive living cells of bacteria-type organisms appeared oxygen production by living cells began about 2.3 billions years ago, half age of planet oxygen reached present concentration in atmosphere approx. 1.1 billion years after there was enough oxygen to accumulate in atmosphere
85224157endosymbiosisA process by which the mitochondria and chloroplasts of eukaryotic cells probably evolved from symbiotic associations between small prokaryotic cells living inside larger ones
85224158directional selectionform of natural selection in which the entire curve moves; occurs when individuals at one end of a distribution curve have higher fitness that indivduals in the middle or at the other end of the curve
85224159stabilizing selectionform of natural selection by which the center of the curve remains in its current position; occurs when individuals near the center of a distribution curve have higher fitness than individuals at either end
85224160disruptive selectionform of natural selection in which a single curve splits into two; occurs when individuals at the upper and lower ends of a distribution curve have higher fitness than individuals near the middle
85224161genetic driftrandom change in allele frequencies that occurs in small populations
85224162founder effectchange in allele frequencies as a result of the migration of a small subgroup of a population
85224163reproductive isolationseparation of species or populations so that they cannot interbreed and produce fertile offspring
85224164behavioral isolationform of reproductive isolation in which two populations have differences in courtship rituals or other types of behavior that prevent them from interbreeding
85224165geographic isolationform of reproductive isolation in which two populations are separated physically by geographic barriers such as rivers, mountains, or stretches of water
85224166theorywell-tested, well-supported explanation that unifies a broad range of observations
85224167fitnessability of an organism to survive and reproduce in its environment
85224168homologous structurestructures that have different mature forms but develop from the same embryonic tissues
85224169vestigial organorgan so reduced in size, it does not serve an important function; may be homologous to structures in other organisms
85224170taxonomyclassification of organisms
85224172genusfirst part of an organism's scientific name
85224173kingdomkingdom second largest taxonomic group; there are six - animalia, plantae, protista, eubacteria, archaebacteria, fungi
85224174domainmost inclusive taxonomic group, larger than kingdom; three exist - bacteria, archaea, eukaryota
85224176phylogenetic treediagram showing evolutionary relationships of organisms with a common ancestor; resembles a tree
85224177divergent evolutionpattern of evolution in which two species become more and more dissimilar
87926419peer reviewThe process by which one's work or research is reviewed by experts in the field to evaluate the validity of the work
87926420basic researchpure science that aims to increase the scientific knowledge base
87926421basic research_____________ is pure science that focuses to increase psychology's scientific knowledge base rather than to solve practical problems, (p. 8)
87926422applied researchscientific investigations intended to solve practical problems
87926423basicsometimes ______ research leads to break troughs in applied research
87926424applied researchIs research that is used to help humans
87926425butterflie studyObservation: buterflies puddle near mownor. Hypothesis: they were there for N,Na,sugar
87926426squirrel studyobservation: squirrels only eat the top half of acorn. hypothesis: the bottom had tannin and tasted bad the squirrels only ate the top which left the bottom for germinating
88021245descent with modificationDarwin's initial phrase for the general process of evolution
88021246misconceptions about evolutionevolution is not a fact: it is a fact ideas around it change but it is a fact. Evolution is only a theory. It is a theory but in science a theory is a well tested and broadly accepted idea. If you believe in evolution then you dont believe in god. Evolution does not negate the possibility of a God. That evolution is deterministic. it is not deterministic it is random. That evolution is highly controversial . all science is controversial. it is only the fine points which are controversial in the theory of evolution
88021247deterministicevolution is random not
88021248the ideas around itevoulution is thought not to be fact but it is only what isn't fact
88021249the possibility of a godevolution does not negate the what
88021250ideas around itEvolution is not controversial only the what are controversial all science is controversial
88021251evidence for evolution-fossil record shows evolutionary relationships between related species--comparative embryology-molecular biology-biogeography-
88021252evidence for evolutioncomparative anatomy species have homologous and analogous structures
88021253comparative anatomylooking at anatomy of organisms (homologous or analogous, divergent or convergent)
88021254homologous structuresBody parts that are similar in origin and structure
88021255analogous structuressimilar adaptations that result from convergent evolution
88021256analogous structuresstructures that do not have a common evolutionary origin but are similar in function
88021257convergent evolutionprocess by which unrelated organisms independently evolve similarities when adapting to similar environments
88021258divergent evolutionwhen two or more species sharing a common ancestor become more different over time
88021259natural selectionprocess by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest
88021260neo darwinismthe modern version of Darwinian evolutionary theory, according to which new variations originate in DNA mutations that provide the raw materials upon which natural selection may act to produce evolutionary change.
88021261neo darwinismDarwin's theories restated in terms of modern genetics.
88021262four points of natural selectionTheir is variation in individuals of same species. This variation is inheritable. Populations exceed resources(malthus). the fit survive
88258758malthusHelped Darwin realize that species produce far more offspring than are capable of surviving and reproducing therefore there will be intense competition among individuals of the same species to survive
88258759kin selectionorganisms are most likely to help others with whom they share the most genes.
88258760group selectionaltruistic act to benefit the group
88258761How of biologythe "how" things work or the mechanisms for how things work. proximate
88258762proximateThe immediate explanation for a phenomenon, e.g. a stimulus such as environmental stimuli that trigger a behavior
88258763why of biologyThe "why" asks why it came about what adaptive significace it may have. Ultimate reason for the trait
88258764pepper mothPollution from the " Industrial Revolution" caused a shift in the proportions of light and dark ________ morphs in many populations. Soot contamination of resting surfaces changed the relative apparency of light and dark morphs to hunting birds. Frequency of dark morph increased significantly as selection pressure relaxed.
88258765pepper mothbiston betularia
88258766look at evidence for evolutionpepper moth, pesticide resistance
88258767pesticide dangerspoison people and animals, Long term effects(cancer) Pesicide residue on crops. Manufacturing disasters
88258768pesicide benefitsreduce insect damage to crop. poison pests. reduce disease
88258769pesticide resistancebichemical, detoxification, mechanical resistance, behavioral resistance
88258770detoxificationone of the modes of pecticide resistance
88258771mechanical resistanceone of the pesicides
88258772behavioral resistanceone of the modes of pesticides
88258773biochemical resistanceone of the modes of resistance
88258774pesticide resistancefirst application almost all die, mutant allel confers resistance,nest application kills less, resistant bugs begin to be more prevalent, pesticide becomes less and less effective, switch to new pesticide and bugs mutate again and become superbugs.
88258775solutions to pesticide resistancepesticides as nonrenewable resources.think in terms of evolution,use pesticides when essential,use othe strategies when possible.
88258776what are the only biological entity of classificationspecies and genus everything else is a man made construct kingdom phylum class order family (genus species)
88258777linnaeusThe founder of modern taxonomy who created binomial nomeclature
88258778v grantevolutionary science was not invented by evolutionary biologists it was invented by christians it was interpreted by evolutionary biologists
88258779gould and eldridgetheory of punctuated quilibruim
88258780geographical distributionThe location of species on Earth helps determine their relationships with other species. Example Finches
88258781adaptive radiationthe development of many different forms from an originally homogeneous group of organisms as they fill different ecological niches
88258782convergence & analogousall vertrbrates have camera eyes
88258783ontogenyrecapitulates phylogeny
88258784embyology proof of evolutiondevelopment of tail and gill slits
88258785allopatric speciationSpeciation due to organisms of a species being separated by geographical barriers so that eventually they become so different that they cannot interbreed.
88258786adaptationinherited characteristic that increases an organism's chance of survival
88258787adaptationsphusiological, mophological, behavioral
88258788preadaptationa structure that evolves and functions in one environmental context, but can perform additional functions when placed in some new environment.Tannin in acorns
88258789general adaptationusing broad environment
88258790special adaptationusing specific part of environment
88258791suite of adaptationswhole group of adaptations
88258792adaptive strategybehavioral pattern or sructure developed to deal with an environmental problem bird mobbing behavioral
88258793coevolutionprocess by which two species evolve in response to changes in each other
88258794coevolutionoccurs when trait of one species has evolved in response to another species which it self has evolved because trait in first species.
88258795ravent & ehrlichfirst introduced co evolution
88258796adaptionist programS. J. Gould and lowenton expecting every charachteristic to exist because of some adaptive significance
88258797pleitropyone gene affects more than one behavior
88258798red queen hypothesisthat as a species is evolving so are the species around that organism and so in the end it may not be any better off than it was in the beginning
88258799adaptive landscapeevolution metaphor; peaks represent gene pools in equilibrium where there is maximum average genetic fitness/ for the population on the peak to shift to another peak, they have to cross the valley where there is least genetic fitness. they must undergo microevolution changes in the population to shift peaks
88258800good hypothesisone that can be tested and falsifiable
88258801hoagland and shermankin selection
88258802mark hafnerCOPHYLOGENY BETWEEN POCKET GOPHERS AND CHEWING LICE
88258803danjansing erlich and ravencoevolution

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