| 9453319837 | Aristotle | believed things could be arranged on a "scale of nature", increasing complexity. Organisms were arranged on a ladder. | | 0 |
| 9453321831 | Linnaeus | developed taxonomy, the study of naming & classifying organisms; binomial nomenclature. Domain, Kingdom, Phylum, Class, Order, Family, Genus species (scientific name) ex. Homo sapiens | | 1 |
| 9453323879 | Georges Cuvier | father of paleontology, studied sedimentary rocks, believed in extinction and catastrophism. Opposed evolution. | | 2 |
| 9453325984 | James Hutton | developed Gradualism, change happens by a slow, continuous process | | 3 |
| 9453329314 | Charles Lyell | geologic processes have not changed since the beginning of time, rate of erosion has not changed | | 4 |
| 9453331083 | Jean - Baptiste Lamarck | published theory of evolution in 1809 (same year as Darwin's birth). Came up with two ideas:
1)theory of use & disuse: those parts used to cope with the environment become larger/stronger, those not used go away (ex) blacksmith develops larger biceps, giraffes neck stretches to reach trees
2)inheritance of acquired characteristics: changes can be passed on to offspring, dyed hair color
NO evidence that acquired characteristics carried on - blacksmiths arm not passed on | | 5 |
| 9453336977 | Charles Darwin | (1809-1882) became clergyman, HMS Beagle voyage around the world, collected different specimens & made observations at all stops during trip. Galapagos Islands - finches, mockingbirds,
1836 - returned from voyage
1844 - wrote an essay on natural selection but did not reveal his discovery
1858 - Alfred Wallace wrote telling that he had found the same discoveries as Darwin; Darwin submitted his essay; published it 1859 On the Origin of Species. 2 main points in paper:
1) species today came from ancestral species
2) developed term "natural selection" populations change over time
*uses term descent with modification rather than evolution, he believed that the history of life was like a tree | | 6 |
| 9453345933 | Darwins Main Ideas | 1. Natural selection is differential success in reproduction
2. Natural selection occurs through an interaction between the environment and the variability inherent among the individual organisms making up a population
3. The product of natural selection is the adaptation of populations of organisms to their environment. | | 7 |
| 9453350113 | Examples of Natural Selection | 1. Insecticide resistant insects - new spray kills 99% of bugs, 1% continue to live and pass on resistant genes, over time few bugs will be resistant
2. Drug resistant bacteria - resistance in individuals occurs early, MRSA | | 8 |
| 9453354156 | Homology | similarities in characteristics resulting from common ancestors | | 9 |
| 9453355940 | Homologous structures | those that contain the same bones
but the structures have different functions in different animals.
The same bones make up the forelimbs of mammals.
(bat wing, human arm, whale flipper) | | 10 |
| 9453356866 | Vestigial organs | those that have little or no value now, but once did. (wisdom teeth, hip bones in snakes, appendix, tonsils) | | 11 |
| 9453358402 | Embryological homologies | embryos of vertebrates look similar have
pharyngeal pouches in throat area = gills for fish, Eustacian tubes for people | | 12 |
| 9453360290 | Molecular homologies | comparison of DNA sequences in all organisms | | 13 |
| 9453361921 | F.A.M.E | Fossil
Anatomy
Molecular Composition
Embryology | | 14 |
| 9453364980 | Biogeography | Geographic distribution of species shows evidence for evolution. Islands have endemic species (only found in that place); these may be related or similar to species found on nearby land masses. | | 15 |
| 9453367330 | Fossil Record | prokaryotes eukaryotes
Vertebrates: fish amphibians reptiles birds & mammals | | 16 |
| 9453375711 | Gradualism | geologic change results from slow & gradual, continuous process | | 17 |
| 9453378604 | Uniformitarianism | Earth's processes same rate in past & present therefore Earth is very old | | 18 |
| 9453380552 | Hutton and Lyell | gradualism and uniformitarianism | | 19 |
| 9453387008 | natural selection | -natural decides
-works on individual
-ex: beaks | | 20 |
| 9453388838 | artificial selection | -man decides
-selective breeding
-inbreeding occurs
-ex: dalamations | | 21 |
| 9453393069 | Evolutionary Fitness | Individuals with more favorable phenotypes more likely to survive and produce more offspring, and pass traits to future generations | | 22 |
| 9453398982 | natural selection ideas | Evolution is change in species over time.
There is overproduction of offspring, which leads to competition for resources.
Heritable variations exist within a population.
These variations can result in differential reproductive success.
Over generations, this can result in changes in the genetic composition of the population | | 23 |
| 9453403571 | evidence for evolution | Direct Observations
Fossil Record
Homology
Biogeography | | 24 |
| 9453406899 | direct observations | Examples:
-Insect populations become resistant to pesticides (DDT)
-Antibiotic-resistant bacteria (MRSA)
-Peppered moth (pollution in city vs. country) | | 25 |
| 9453410109 | Fossil Record | -Fossils = remains or traces of organisms from past
-Found in sedimentary rock
-Paleontology: study of fossils
-Show evolutionary changes that occur over time and origin of major new groups of organisms | | 26 |
| 9453419063 | analogous structures | similar structures, function in similar environments | | 27 |
| 9453420924 | endemic species | found at a certain geographic location and nowhere else | | 28 |
| 9453427379 | Microevolution | change in the allele frequencies of a population over generations | | 29 |
| 9453429806 | Point mutations | changes in one base (eg. sickle cell) | | 30 |
| 9453431132 | Chromosomal mutations | delete, duplicate, disrupt, rearrange usually harmful | | 31 |
| 9453432517 | Sexual recombination | contributes to most of genetic variation in a population
1. Crossing Over (Meiosis - Prophase I)
2. Independent Assortment of Chromosomes (during meiosis)
3. Random Fertilization (sperm + egg) | | 32 |
| 9453436040 | Population genetics | study of how populations change genetically over time | | 33 |
| 9453437331 | Population | group of individuals that live in the same area and interbreed, producing fertile offspring | | 34 |
| 9453438783 | Gene pool | all of the alleles for all genes in all the members of the population
-Diploid species: 2 alleles for a gene (homozygous/heterozygous) | | 35 |
| 9453440402 | Fixed allele | all members of a population only have 1 allele for a particular trait
-The more fixed alleles a population has, the LOWER the species' diversity | | 36 |
| 9453441634 | Hardy-Weinberg Theorum | The allele and genotype frequencies of a population will remain constant from generation to generation | | 37 |
| 9453442983 | Equilibrium | allele and genotype frequencies remain constant | | 38 |
| 9453446516 | conditions for H W Equilibrium | No mutations.
Random mating.
No natural selection.
Extremely large population size.
No gene flow. | | 39 |
| 9453448244 | Allele Frequencies | Gene with 2 alleles : p, q | | 40 |
| 9453448245 | p | frequency of dominant allele (A) | | 41 |
| 9453448246 | q | frequency of recessive allele (a) | | 42 |
| 9453453556 | Genotypic Frequencies | 3 genotypes (AA, Aa, aa) | | 43 |
| 9453454800 | p squared | AA (homozygous dominant) | | 44 |
| 9453454801 | 2pq | Aa (heterozygous) | | 45 |
| 9453454802 | q squared | (homozygous recessive) | | 46 |
| 9453463640 | minor causes of evolution | 1. Mutations
Rare, very small changes in allele frequencies
2. Nonrandom mating
Affect genotypes, but not allele frequencies | | 47 |
| 9453465053 | major causes of evolution | Natural selection, genetic drift, gene flow | | 48 |
| 9453468683 | Genetic Drift | Small populations have greater chance of fluctuations in allele frequencies from one generation to another
ex: founder effect, bottleneck effect | | 49 |
| 9453471039 | Founder Effect | -A few individuals isolated from larger population
-Certain alleles under/over represented | | 50 |
| 9453472792 | Bottleneck Effect | Sudden change in environment drastically reduces population size | | 51 |
| 9453475738 | Gene Flow | Movement of fertile individuals between populations
Gain/lose alleles
Reduce genetic differences between populations | | 52 |
| 9453478653 | alter frequency caused by natural selection | 1. Directional selection
2. Disruptive (diversifying) selection
3. Stabilizing selection | | 53 |
| 9453480333 | Directional Selection | ex: larger black bears survive extreme cold better than small ones | | 54 |
| 9453481867 | Disruptive Selection | ex: small beaks for small seeds; large beaks for large seeds | | 55 |
| 9453481868 | Stabilizing Selection | ex: narrow range of human birth weight | | 56 |
| 9453485403 | Sexual dimorphism | difference between 2 sexes
-Size, color, ornamentation, behavior | | 57 |
| 9453486922 | Intrasexual | selection within same sex (eg. M compete with other M) | | 58 |
| 9453487896 | Intersexual | mate choice (eg. F choose showy M) | | 59 |
| 9453489685 | Diploidy | hide recessive alleles that are less favorable | | 60 |
| 9453490763 | Heterozygote advantage | greater fitness than homozygotes
-ex: Sickle cell disease | | 61 |
| 9453496240 | Species | population or group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring
-Reproductively compatible | | 62 |
| 9453498409 | Reproductive isolation | barriers that prevent members of 2 species from producing viable, fertile hybrids | | 63 |
| 9453499536 | Prezygotic Barriers | -Impede mating/fertilization
Types:
-Habitat isolation
-Temporal isolation
-Behavioral isolation
-Mechanical isolation
-Gametic isolation | | 64 |
| 9453501261 | Postzygotic Barriers | -Prevent hybrid zygote from developing into viable adult
Types:
-Reduced hybrid viability
-Reduced hybrid fertility
-Hybrid breakdown | | 65 |
| 9453504396 | Morphological | by body shape, size, and other structural features | | 66 |
| 9453504397 | Ecological | niche/role in community | | 67 |
| 9453505543 | Phylogenetic | share common ancestry, branch on tree of life | | 68 |
| 9453508261 | Allopatric Speciation | "other" "homeland"
-geographically isolated populations
-caused by geologic events or processes
-evolves by natural selection and genetic drift | | 69 |
| 9453515117 | sympatric speciation | "together""homeland"
-overlapping populations within home range
-gene flow between subpopulations blocked by polyploidy, sexual selection, and habitat differentiation | | 70 |
| 9453522055 | Autopolyploid | extra sets of chromosomes
-Failure of cell division (2n 4n) | | 71 |
| 9453523073 | Allopolyploid | 2 species produce a hybrid
-Species A (2n=6) + Species B (2n=4) Hybrid (2n=10) | | 72 |
| 9453525562 | adaptive radiation | Many new species arise from a single common ancestor
Occurs when:
-A few organisms make way to new, distant areas (allopatric speciation)
-Environmental change extinctions new niches for survivors | | 73 |
| 9453528342 | Hybrid Zones | -Incomplete reproductive barriers
-Possible outcomes: reinforcement, fusion, stability | | 74 |
| 9453530204 | Gradualism | -Common ancestor
-Slow, constant change | | 75 |
| 9453531503 | Punctuated Equilibrium | -Eldridge & Gould
-Long period of stasis punctuated by short bursts of significant change | | 76 |