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9785140881The Dung of the Devil1918-1920 used to cure Spanish flu also helped for H1N1 flu (2009-2010) biodiversity has instrumental (practical) value for people0
9785153516ecosystem diversitythe number and types of ecosystems in a region and the complexity of the systems - number of trophic levels -number of niches measure of ecological health for a region1
11082953322species diversitythe variety of species in an ecosystem -> often represented with count measure of health for an ecosystem2
11082969017genetic diversityvariety of genes and traits present in a population -> one species measure of health for a population3
11083014003number of species identified2 million4
11083016541number of estimated species5-100 million5
11083016542best estimate of number of species10 million6
11083029390why is it hard to estimate the total number of speciesmost species are hard to find most come out at night they are live in inaccessible locations cannot be seen with a microscope7
11083044370largest group of speciesinsects8
11083072428species richnessthe number of species in a given area used to give an approximate sense of biodiversity in a given place9
11083472636species evennessthe relative proportion of individuals within the different species in a location tells us whether a particular ecosystem is numerically dominated by one species or whether all of its species have abundances10
11083502765high species evennessspecies are all represented by similar numbers of individuals11
11083507121low species evennessone species is represented by many individuals whereas other species are represented by only a few individuals12
11083599548evolutionchange in genetic composition of a population over time13
11083620639microevolutionwithin one species change in gene frequency a new trait becomes "fixed" (100% of the population has the trait)14
11083685997macroevolutionwhen genetic changes give rise to new species (larger categories of organisms into which species are organized) relationships between different species phylogeny and speciation15
11083729717how is genetic diversity created?through mutation and recombination16
11083832699mutationan occasional mistake in the copying process produces a random change in the genetic code UV radiation may also cause mutation can be harmful or beneficial17
11083893457recombinationoccurs as chromosomes are duplicated during reproductive cell division and a piece of one chromosome breaks off and attaches to another chromosome does not create new genes but creates new and different combinations of alleles on a chromosome18
11083842656can changes in genotypes produce changes in phenotypes?yes19
11083944546artificial selectionwhen humans determine which individuals to breed, typically with a preconceived set of traits in mind example: dogs from wolf20
11083987583natural selectionthe environment determines which individuals survive and reproduce21
11084024847key ideas to Darwins theoryindividuals produce an excess of offspring. not all offspring can survive. individuals differ in their traits. differences in traits can be passed on from parents to offspring. differences in traits are associated with differences in the ability to survive and reproduce.22
11084074039fitnessability to survive and reproduce23
11084077463adaptationstraits that improve an individuals fitness24
11084170046genetic drifta change in the genetic composition of a population over time as a result of random mating25
11084196654bottleneck effectdrastic reduction in the size of a population that reduces genetic variation can occur from habitat loss, a natural disaster, harvesting by humans, or changes in the environment26
11084325129founder effectchange in the genetic composition of a population as a result of descending from a small number of colonizing individuals27
11084522130allotropic speciationthe physical separation of a group of individuals from others of the same species geographic and reproductive isolation ex: the mice28
11084546870sympatric speciationevolution of one species into two species without geographic isolation polyploidy - have more chromosome sets and become reproductively isolated from original diploid ancestor29
11084643561evolution occurs fast whensmall population short generation time high biodiversity high mutation rate high selective pressure30
11084650291evolution occurs slow whenlarge population long generation time low biodiversity low mutation rate low selective pressure31
11084690735GMOsusing genetic engineering techniques, scientists can now copy genes from a species with some desirable trait, such as rapid growth or disease resistance. Scientists can insert these genes into other species of plants, animals, or microbes to produce them32
11084725323range of tolerancelimits to the abiotic conditions they can tolerate33
11084749074fundamental nichethe suite of abiotic conditions under which a species can survive, grow, and reproduce34
11084762954realized nicherange of abiotic and biotic conditions under which a species actually lives35
11085022939niche generalistcan live under a very wide range of abiotic or biotic conditions36
11085022940niche specialistsspecialized to live under a very narrow range of conditions or feed on a small group of species37
110852042085 mass extinctionsOrdovician, Devonian, Permian, Triassic, Cretaceous38

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