EVOLUTION. Caution : these notes may change from the original... They are still evolving.
|
|
- Gervais Wilcox
- 5 years ago
- Views:
Transcription
1 EVOLUTION Caution : these notes may change from the original... They are still evolving.
2 SO WHAT IS EVOLUTION ANYWAY? Definition: A change over time More specifically: change in relative frequency of alleles in a population Note the word POPULATION INDIVIDUALS DO NOT EVOLVE
3 SOURCES OF CHANGE 1. Sexual Reproduction ( Random Shuffling of alleles) 2. Mutations 3. Geographic isolation
4 So, What does Darwin have to do with it?
5 CHARLES DARWIN Born in England February 12, 1809 to a wealthy family attended Oxford University became a naturalist joined the crew of the H.M.S. Beagle for a 5 year voyage (1831)
6 WHAT DARWIN LEARNED FROM THE VOYAGE made numerous observations and collected data that led him to propose a revolutionary hypothesis about the way life changes (evolution).
7 DARWIN S OBSERVATIONS: 1. Patterns of Diversity plants and animals are well suited to whatever environment they inhabit Different species live all over the world. Ex. Argentina, Australia, and England have similar grassland ecosystems, yet the animals inhabiting the areas were different.
8 2. Living Organisms and Fossils collected remains of preserved organisms called fossils. Some of the fossils resembled organisms that were still alive and others looked completely unlike any creature he had ever seen.
9 3. The Galapagos Islands characteristics of many animals and plants varied noticeably among the different Galapagos Islands. Ex. The tortoises shape of the shell corresponded to different habitats. ( Do not write) Hood Island tortoise long neck and curved shell that is open and allows it reach sparse vegetation
10 HOOD ISLAND ( RIGHT) Isabela Island(below) Pinta Island right
11 OTHER ORGANISMS noticed that the finches on the Islands all had different beaks likely that a few finches founded the population but mutations over time allowed them to eat different foods. New beaks continued to be passed to the next generation which eventually led to different species
12 VARIETY OF FINCHES
13 Plants also undergo the same pressures of the environment Variety of vegetation found based on the type of climate that exists
14 EVOLUTION BY NATURAL SELECTION Definition: process by which individuals that are better suited to their environment survive and reproduce most successfully.
15 THE PEPPERED MOTH
16 Not a random process. The mutation is random, but selection acts on that variation in a very non-random way: genetic variants that aid survival and reproduction are much more likely to become common than variants that don't. Natural selection is not random! (University of Berkeley)
17 ARTIFICIAL SELECTION using genetic variation to improve crops or livestock ; artificial selection Artificial selection: nature provided the variation and humans select those variations that they found useful.
18 5 MAJOR POINTS TO THE NATURAL SELECTION HYPOTHESIS 1. Genetic variations exist in populations. Some variations are more favorable than others. These variations are inherited. 2. Organisms produce more offspring than can survive. Those that do not survive, do not reproduce.
19 3. Overproduction of offspring forces competition for resources. Darwin called this the struggle for existence. Not all offspring can possibly survive. 4. Individuals with favorable variations have more fitness ;more likely to survive and pass those variations on to their offspring.
20 5. Species alive today are descended with modification from ancestral species that lived in the distant past. Darwin called this descent with modification.
21 SURVIVAL OF THE FITTEST Link to Natural Selection example cartoon Adaptations: any inherited trait that increases the chances of survival and reproduction of an organism. Camouflage and Mimicry allow animals with successful variations survive and reproduce EXAMPLES IN NATURE: Mimicry:Monarch and Viceroy, Moth and Bumblebee Camouflage: Squirrels, Leopards, walking sticks, Praying Mantis
22
23 WHERE S THE PROOF? 1 Fossils 2 Geographical distribution 3 Homology 4. Vestigial Structures 5 Embryology 6 Biochemistry (the chemistry of living organisms)
24
25 1) Fossils: FOSSILS Remnants of organisms left behind Scientists can compare the bones of horses from 4 million years ago to ones from the present day. Fossils found in every layer of rock do not look the same as those from modern life. The oldest fossils are more different from the modern day organisms than the shallowest fossils
26 2) GEOGRAPHIC DISTRIBUTION similar animals in very far away places. Animals use different adaptations to survive in similar environments even though the environments are separated. Analogous Structures: Different in Structure but the same in function These do not show evidence of evolutionary relationships but, they do show natural selection.
27 3. HOMOLOGY Many organisms have similar bones though not closely related. These are called Homologous structures. Suggest a common ancestor, shows strong evolutionary relationships Example: Birds, turtles, alligators, rats, humans, and whales all have finger bones
28 Put picture of human, horse, cat, bat, bird, whale here
29 4. VESTIGIAL STRUCTURES any structure that is so reduced in function or size that they are just vestiges or traces of the original structure. The structure may have been used in an ancestor. The structure may be used in another animal alive today. Examples: Appendix, small leg bones in pythons, pelvic bones in whales Tonsils actually DO HAVE A FUNCTION even though they can be removed.
30 PICTURE OF VESTIGIAL STRUCTURES
31 5. EMBRYOLOGY Of animals with backbones, the embryonic stages look strikingly similar ; similar genes at work
32 WHAT DOES THIS SUGGEST? Suggests a common ancestor and evolutionary relationships Groups of embryonic cells develop in the same order and in similar patterns
33 6. BIOCHEMISTRY The more closely related organisms are, the more they will share in common biochemistry (the chemistry of what makes up their bodies) similar DNA sequences and proteins Relatively new means of identifying evolutionary relationships has led to the re-organization of the history of several species * can tell when species diverged from one another
34 CHAPTER 17 NOTES: EVOLUTION AND POPULATIONS
35 CH. 17 IS ALL EVOLUTION THE SAME? No, it does not happen in the same way across all populations. Genetic variation in organisms is studied at the level of a population not the individual. A population is a group of individuals of the same species that live in the same area.
36 POPULATIONS Members of a population of species interbreed, therefore they share a common group of genes called a gene pool. Gene Pool: all of the genes that are present in a population. This includes all the different alleles.
37 The relative (allelic) frequency of an allele is the number of times that the allele occurs in a gene pool compared to the number of times other alleles for the same gene occur. Q: How do new alleles arise? Through random mutations. Gene shuffling during meiosis Crossing over Sexual Reproduction
38 RECALL FROM SLIDE #2 * evolution : any change in the relative frequency of alleles in a population. if the frequency of the allele changes, then the population is evolving.
39 RECALL FROM GENETICS Inheritable variation can be expressed by either single-gene traits or by polygenic traits. The number of phenotypes produced for a given trait depends on how many genes control the trait.
40 EVOLUTION CAN OCCUR IN THREE WAYS Directional selection Stabilizing Selection Disruptive Selection
41 POPULATIONS Most phenotypes in generations form a bell shaped curve The most common variety is represented in the middle of the curve and more extreme variations are on either end of the curve. * (hair color) Evolution shifts the curve by changing the percentage of each variation.
42 DIRECTIONAL SELECTION Individuals on one end of the curve are better adapted to their environment. EXAMPLE: Beak size (finches) The birds with the medium beak are the majority. Small and large beaks are on the ends of the curve. If a drought occurs and only the very large seeds survive, only large-beaked birds will be able to eat.
43 DIRECTIONAL SELECTION The average beak size increases since more of the larger beaked finches could survive and reproduce.
44 STABILIZING SELECTION When the average individual is best, the population stabilizes-reduces the percentage of organisms on the extremes Example: Birth weight in humans stays stable because too small a weight is harmful for the baby and too big a weight results in complications at birth.
45 STABILIZING SELECTION
46 DISRUPTIVE SELECTION This occurs when either extreme is better adapted for survival than the average. EXAMPLE: most of a species of a butterfly are brown. But, on either end of the population curve, you see RED and BLUE Brightly colored butterflies resemble very poisonous butterflies and thus, do not get eaten.
47 DISRUPTIVE SELECTION
48 SMALL POPULATIONS The percentages of alleles change more quickly- GENETIC DRIFT random change in allelic frequency If populations get separated and each new population only has two of the four variations, you have what is called a FOUNDER EFFECT Def: Change in allele frequencies as a result of migration of a small subgroup
49 GENETIC drift and FOUNDER EFFECT
50 ARE POPULATIONS ALWAYS EVOLVING? No, but there are 5 conditions which must be met for a population not to be evolving. Requirements to maintain genetic equilbrium: 1) Random mating In nature, random mating rarely occurs. Example: Lions select their mates based on size or strength.
51 2) Large population 3) No movement into or out of population 4) No mutations 5) No natural Selection THIS IS KNOWN AS THE HARDY- WEINBURG PRINCIPLE
52 dit It is difficult for all of the conditions to be met. There,
53 SO, HOW DO WE GET A NEW SPECIES? All of these changes over time can eventually lead to a new species This process is called SPECIATION
54 3 TYPES OF SPECIATION Caused by 3 isolating mechanisms: Behavioral Geographic Temporal
55 BEHAVIORAL ISOLATION Occurs when two populations are capable of interbreeding but do not. (due to difference in rituals/ behaviors) EX: Eastern and Western meadowlarks both live in central US They do not mate because they use different songs to attract their mates
56 GEOGRAPHIC ISOLATION Geographic isolation occurs when 2 populations cannot reach each other to mate due to a physical barrier. EX: earthquake in CA creates a huge crevasse in the ground, isolating a population of lizards Since the two populations cannot mate, they begin to have subtle changes over time that make them different species
57 TEMPORAL ISOLATION Occurs when the species reproduce at different times of the year. EX: 3 species of orchid all live in the same area but, they never interbreed because they release their pollen at different times of the year.
58 ORCHIDS
59 HOW FAST CAN EVOLUTION OCCUR? Gradualism- when evolution occurs slowly over time ( most of what we have talked about) Punctuated Equilibrium when a major event changes the distribution of a population leads to a quick burst of changes since mutations spread quickly through small populations
60 CH. 17 HISTORY OF LIFE ON EARTH And, should I become a paleontologist rather than a dentist?
61 CH. 17 A BRIEF HISTORY OF TIME Geologic evidence shows that Earth is about 4.6 billion years old.
62 By the fossil record, scientists have learned that not all types of animals appeared all at once. Fact: more than 99 percent of all species that have ever lived on Earth have become extinct. Earliest life forms appeared in rocks more than 3.5 billion years old. Paleontologists scientists who study fossils
63 FOSSILS WHAT DO YOU LOOK AT? 1.Anatomical similarities and differences between the fossil organism and organisms living today. 2. The fossil s age. 3. What the environment may have been like when the organism was alive. This may tell you what the organism ate and how it lived.
64 DATING METHODS 1) Relative: The age of the fossil is determined by comparing its placement in the sedimentary rock with that of fossils in other layers Index fossils are used
65
66 WHAT ARE INDEX FOSSILS? Fossils of a species that are easily recognized. Existed for only a short period of time so it will only be found in a few layers of rock. Had a wide geographic distribution.
67 RADIOACTIVE DATING 2) Radioactive: calculate absolute ages of the fossil based on the amount of remaining radioactive isotope it contains. Different radioactive isotopes have different half-lives (rates of decay). EX: Carbon-14: decays into nitrogen-14 every 5739 years which is called the half-life. EX: Potassium-40: decays into argon-40 every 1.26 billion years.
68 HOW DOES IT WORK EXACTLY? All plants and animals incorporate carbon into their tissues during their lives for growth and energy. When an organism dies, it stops incorporating carbon (all forms of carbon, including C14) into its structure. The amount of radioactive carbon (C14) that had been in the organism when it was alive begins to decrease at death as it loses nuclear particles through radioactive decay. C14 is only good for dating fossils younger than 60, 000 years old the "clock" starts ticking when death occurs.
69
70 A BRIEF HISTORY OF TIME Earth s atmosphere did not contain oxygen, so microorganisms were the first to appear (prokaryotic).in the water Once oxygen appears, eukaryotic organisms appear. Theory of Endosymbiosis Eukaryotic cells arose from living communities formed by prokaryotic cells.
71 THEORY OF ENDOSYMBIOSIS Mitochondria and chloroplasts contain their own DNA Mitochondria and chloroplasts have ribosomes that make their own proteins. Like bacteria, mitochondria and chloroplasts have many of the features of free-living bacteria such as being able to grow and reproduce independently of the cell.
72 A BRIEF HISTORY OF TIME Since all organisms have appeared sequentially, it would seem logical to assume that each gave rise to the other.. This is not quite the case. Evolution argues that organisms share ancestors not that one evolved into another.
73 .CLADOGRAM OF THE VERTEBRATE CHORDATES IMAGE FROM PURVES ET AL., LIFE: THE SCIENCE OF BIOLOGY, 4TH EDITION, BY SINAUER ASSOCIATES (
74 CLADOGRAMS Classification into cladograms helps us to categorize living organisms based on evolutionary relationships and DNA. Analyzing DNA allows scientists to determine when a species diverged from another. Cladograms show lines of evolutionary descent not just physical similarities.
75 PATTERNS OF EVOLUTION IN POPULATIONS Adaptive radiation Convergent evolution Coevolution extinction
76 ADAPTIVE RADIATION/ DIVERGENT EVOLUTION A single species evolves into more populations by creating adaptations to different environments or niches EX: Darwin s finches Hawaiian Fruit flies -
77 CONVERGENT EVOLUTION Unrelated organisms resemble each other since they have adapted to the same environment. Ex: fish and dolphins both have fins Birds and dragonflies both have wings RECALL: These are called analogous structures ( same function but different structure)
78 COEVOLUTION When two species evolve in response to one another EX: Flowers and their pollinators must evolve together. If the flower has a mutation that no longer attracts the hummingbird, it will not reproduce.and then, the hummingbird will have to find a new food source.
79
80 EXTINCTION When a species cannot adapt to its changing environment Competition Climate change
81 So much to learn, so little time! Evolution is a whole course in college all by itself!
EVOLUTION. Caution : these notes may change from the original... They are still evolving.
EVOLUTION Caution : these notes may change from the original... They are still evolving. SO WHAT IS EVOLUTION ANYWAY? Definition: A change over time More specifically: change in relative frequency of alleles
More informationSo what is Evolution anyway?
Evolution 3/2/14 So what is Evolution anyway? Definition: A change over time More specifically: change in relative frequency of alleles in a population Note the word POPULATION INDIVIDUALS DO NOT EVOLVE
More information19. When allele frequencies change as a result of the migration of a small subgroup of a population
CP Biology: Evolution Name: Per: Directions: Use your textbook to help you answer the practice questions for each chapter. It is important that you READ the chapter sections and not just search for the
More information1. E, or change over time, is the process by which modern organisms have descended from ancient organisms
Name Date Period EVOLUTION STARTS WITH? 1. E, or change over time, is the process by which modern organisms have descended from ancient organisms 2. A scientific T is a well supported, testable explanation
More informationUnit 8: EVOLUTION NOTES
Unit 8: EVOLUTION NOTES Canale LE EVOLUTION is the change in gene frequency in a population over time. Generally, organisms change from simple to more complex, and happens over many generations. **Evolution
More informationWhat is Evolution? Study of how things change over time
10.2 15 Darwin s Theory Observations of Evolution What is Evolution? Study of how things change over time 10.2 15 Darwin s Theory Observations of Evolution Theories of Evolution - Lamarck Jean Baptiste
More informationBiology Chapter 15 Evolution Notes
Biology Chapter 15 Evolution Notes Section 1: Darwin's Theory of Evolution by Natural Selection Charles Darwin- English naturalist that studied animals over a number of years before developing the theory
More informationEvolution Unit: What is Evolution?
Evolution Unit: What is Evolution? What is The Theory of Evolution? Evolution is, a change (in the genetic composition) of a population over time. on a larger scale, the entire biological history, from
More informationEVOLUTION change in populations over time
EVOLUTION change in populations over time HISTORY ideas that shaped the current theory James Hutton (1785) proposes that Earth is shaped by geological forces that took place over extremely long periods
More informationTHE THEORY OF EVOLUTION
THE THEORY OF EVOLUTION Why evolution matters Theory: A well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation
More informationEVOLUTION change in populations over time
EVOLUTION change in populations over time HISTORY ideas that shaped the current theory James Hutton & Charles Lyell proposes that Earth is shaped by geological forces that took place over extremely long
More informationUnderstanding Natural Selection
Understanding Natural Selection Charles Darwin (1809-1882) Sailed around the world 1831-1836 What did Darwin s Travels reveal The diversity of living species was far greater than anyone had previously
More informationName Date Class. Patterns of Evolution
Concept Mapping Patterns of Evolution Complete the flowchart about patterns of evolution. These terms may be used more than once: adaptive radiation, change in response to each other, convergent evolution,
More informationEVOLUTION. HISTORY: Ideas that shaped the current evolutionary theory. Evolution change in populations over time.
EVOLUTION HISTORY: Ideas that shaped the current evolutionary theory. Evolution change in populations over time. James Hutton & Charles Lyell proposes that Earth is shaped by geological forces that took
More informationEvolution of Populations
Evolution of Populations Gene Pools 1. All of the genes in a population - Contains 2 or more alleles (forms of a gene) for each trait 2. Relative frequencies - # of times an allele occurs in a gene pool
More informationTheory a well supported testable explanation of phenomenon occurring in the natural world.
Evolution Theory of Evolution Theory a well supported testable explanation of phenomenon occurring in the natural world. Evolution the process by which modern organisms changed over time from ancient common
More informationEVOLUTION. Charles Darwin
EVOLUTION Charles Darwin Question for Thought Earth has millions of other kinds of organisms of every imaginable shape, size, and habitat. This variety of living things is called biological diversity.
More informationGuided Notes: Evolution. is the change in traits through generations over! Occurs in, NOT individual organisms
Guided Notes: Evolution The Theory of Evolution is the change in traits through generations over! Occurs in, NOT individual organisms How Have Organisms Changed? At the time life emerged, the Earth was
More informationDarwin s Observations & Conclusions The Struggle for Existence
Darwin s Observations & Conclusions The Struggle for Existence 1 Voyage of the Beagle During His Travels, Darwin Made Numerous Observations And Collected Evidence That Led Him To Propose A Revolutionary
More informationWhat is Evolution? Evolution = Most changes occur gradually, but can happen on a shorter time scale Variations in populations come from
Evolution Notes What is Evolution? Evolution = Most changes occur gradually, but can happen on a shorter time scale Variations in populations come from Time Line of Scientists 1785 proposes that the Earth
More informationREVIEW 6: EVOLUTION. 1. Define evolution: Was not the first to think of evolution, but he did figure out how it works (mostly).
Name: REVIEW 6: EVOLUTION 1. Define evolution: 2. Modern Theory of Evolution: a. Charles Darwin: Was not the first to think of evolution, but he did figure out how it works (mostly). However, Darwin didn
More informationCH_15_Evolution.notebook. February 28, Cellular Evolution. Jean Baptiste de Lamarck. Endosymbiont Theory. Charles Darwin
Cellular Evolution The first cells were prokaryotic They did not need oxygen (the atmosphere did not contain oxygen until 1.8 billion years ago) Eukaryotic cells were found in the fossil record about 2
More informationNOTES Ch 17: Genes and. Variation
NOTES Ch 17: Genes and Vocabulary Fitness Genetic Drift Punctuated Equilibrium Gene flow Adaptive radiation Divergent evolution Convergent evolution Gradualism Variation 17.1 Genes & Variation Darwin developed
More informationName: Period Study Guide 17-1 and 17-2
Name: Period Study Guide 17-1 and 17-2 17-1 The Fossil Record (pgs. 417-422) 1. What is the fossil record? 2. What evidence does the fossil record provide? 1. 2. 3. List the 2 techniques paleontologists
More informationHistory of Biological Diversity. Evolution: Darwin s travel
History of Biological Diversity Evolution: Darwin s travel Developing the Theory of Evolution The Galápagos Islands Darwin noticed that the different islands all seemed to have their own, slightly different
More informationEvolution. Formation of EARTH. First cells by endosymbiosis. The Scientists. Lamarck Darwin. Change Over Time
Evolution Change Over Time Evolution Definition: A change in a population of a species over time Organisms evolve to adapt better to their environment According to Evolution, all living things (organisms)
More informationCh. 16 Evolution of Populations
Ch. 16 Evolution of Populations Gene pool the combined genetic information of all the members of a population. There are typically 2 or more alleles for a certain trait. (dominant or recessive) Allele
More informationTheory of Evolution. Evolution The process of change over time. Specifically, a change in the frequency of a gene or allele in a population over time
Theory of Evolution Learning Goals Define "Evolution" & "Natural Selection". Describe the 4 steps of Natural Selection, giving an example of each. Explain the importance of "Variation". Does Natural Selection
More informationEvolution. Chapters 16 & 17
Evolution Chapters 16 & 17 Darwin s Voyage Chapter 16 Change over time Evolution Charles Darwin Developed a scientific theory that explains how modern organisms evolved over long periods of time through
More informationVocab Darwin & Evolution (Chap 15)
Vocab Darwin & Evolution (Chap 15) 1. Evolution 2. Theory 3. Charles Darwin 4. Fossil 5. Species 6. Natural variation 7. Artificial selection 8. Struggle for existence 9. Fitness 10.Adaptation 11.Survival
More informationGene Pool The combined genetic material for all the members of a population. (all the genes in a population)
POPULATION GENETICS NOTES Gene Pool The combined genetic material for all the members of a population. (all the genes in a population) Allele Frequency The number of times a specific allele occurs in a
More informationVocabulary List: Instructions: blackout
Artificial Selection Competition Fitness Adaptation Natural Selection Descent with Modification Common Ancestor Fossil Record Geographic Distribution Homologous Body Structures Vestigial Organs Similarities
More informationEvolution Test Review
Name Evolution Test Review Period 1) A group of interbreeding organisms (a species) living in a given area is called population 2) Give an example of a species. Ex. One wolf Give an example of a population.
More information1. E, or change over time, is the process by which modern organisms have descended from ancient organisms
Name Date Period EVOLUTION STARTS WITH? 1. E, or change over time, is the process by which modern organisms have descended from ancient organisms 2. A scientific T is a well supported, testable explanation
More informationName Date Class CHAPTER 15. In your textbook, read about developing the theory of natural selection. For each statement below, write true or false.
Name Date Class Study Guide CHAPTER 15 Section 1: Darwin s Theory of Evolution by Natural Selection In your textbook, read about developing the theory of natural selection. For each statement below, write
More informationMicroevolution is a change in the gene frequencies of a population. Can happen quickly. Ex: antibiotic resistant bacterial colonies
Evolution Unit 1 Microevolution is a change in the gene frequencies of a population. Can happen quickly Ex: antibiotic resistant bacterial colonies New species evolve and no longer interbreed with the
More informationChapter 15 Theory of Evolution
Chapter 15 Theory of Evolution 15-1 History of Evolutionary Thought Evolution- the development of new species form pre-existing species. -change over time. In the 1800 s scientists began to present evidence
More informationEvolution. Darwin s Voyage
Evolution Darwin s Voyage Charles Darwin Explorer on an observation trip to the Galapagos Islands. He set sail on the HMS Beagle in 1858 from England on a 5 year trip. He was a naturalist (a person who
More informationof EVOLUTION???????????? states that existing forms of life on earth have arisen from earlier forms over long periods of time.
Evolution The WHAT theory IS of EVOLUTION???????????? states that existing forms of life on earth have arisen from earlier forms over long periods of time. Some of the strongest evidence to support evolution
More informationEVOLUTION No matter what your beliefs are, it is always better to have as much information as you can so that you can form your own, educated opinion!
EVOLUTION No matter what your beliefs are, it is always better to have as much information as you can so that you can form your own, educated opinion! Standards SB5. Students will evaluate the role of
More informationTHE HISTORY OF THE THEORY. Darwin presented that happens and offered an of how it happens. Theory a broad that has been and
Evolution Notes THE HISTORY OF THE THEORY Why is the evolutionary theory associated with Charles Darwin? Darwin presented that happens and offered an of how it happens. o Evolution the process by which
More informationWhat is Evolution? Evolution Unit Vocabulary. Answer: Evidence of Evolution. What is a Gene Pool? Change over time.
What is Evolution? Evolution Unit Vocabulary Practice Quiz Change over time. Evidence of Evolution The gradual development of something, especially from simple to more complex. Can be big or very small
More informationChapter 16. Darwin s Theory Of Evolution
Chapter 16 Darwin s Theory Of Evolution 16-1 I. Evolution A. process by which modern organisms have descended from ancient organisms (change over time) II. Charles Darwin A. Sailed around the world on
More informationEvolution and Darwin
Evolution and Darwin Evolution The processes that have transformed life on earth from it s earliest forms to the vast diversity that characterizes it today - Darwin Old Theories of Evolution Jean Baptiste
More informationEvolution Unit Ch in Miller & Levine Biology textbook
Evolution Unit Ch. 15-17 in Miller & Levine Biology textbook Evolution: theory of how modern organisms have descended from ancient organisms; a.k.a. "a change over time" Charles Darwin is one of the many
More informationPlease Do Not Write On The Charles Darwin and Evolution Study Guide Practice test Practice Test Multiple Choice
Please Do Not Write On The Charles Darwin and Evolution Study Guide Practice test Practice Test Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.
More informationEvolution and Natural Selection (16-18)
Evolution and Natural Selection (16-18) 3 Key Observations of Life: 1) Shared Characteristics of Life (Unity) 2) Rich Diversity of Life 3) Organisms are Adapted to their Environment These observations
More informationWhere did all the diversity come from?
Evolution Where did all the diversity come from? Evolution change over time; the process by which modern organisms have descended from ancient organisms Charles Darwin contributed to the theory of evolution
More informationEvolution. Species Changing over time
Evolution Species Changing over time Objectives I can differentiate between natural selection and artificial selection and I can give examples of each. I can explain several reasons for genetic variation
More informationBiology. Slide 1 of 41. End Show. Copyright Pearson Prentice Hall
Biology 1 of 41 Do Now: Why do the colors of moths change over time? Write a detailed explanation on the scrap paper provided. 2 of 41 Why do the colors of moths change over time? 3 of 41 4 of 41 Evolution
More informationDarwin s Theory of Evolution
EVOLUTION Darwin s Theory of Evolution n Evolution, or change over time, is the process by which modern organisms have descended from ancient organisms. n A scientific theory is a well-supported testable
More informationVocab. ! Evolution - change in a kind of organism over time; process by which modern organisms have descended from ancient organisms
Vocab! Evolution - change in a kind of organism over time; process by which modern organisms have descended from ancient organisms! Theory - well-tested explanation that unifies a broad range of observations
More informationChapter 15 Evolution
Section 1: Darwin s Theory of Natural Selection Section 2: Evidence of Section 3: Shaping ary Theory Click on a lesson name to select. 15.1 Darwin s Theory of Natural Selection Darwin on the HMS Beagle
More informationEVOLUTION. Evolution - changes in allele frequency in populations over generations.
EVOLUTION Evolution - changes in allele frequency in populations over generations. Sources of genetic variation: genetic recombination by sexual reproduction (produces new combinations of genes) mutation
More informationSection 15 3 Darwin Presents His Case
Section 15 3 Darwin Presents His Case (pages 378 386) Key Concepts How is natural variation used in artificial selection? How is natural selection related to a species fitness? What evidence of evolution
More informationEvolutionary change. Evolution and Diversity. Two British naturalists, one revolutionary idea. Darwin observed organisms in many environments
Evolutionary change Evolution and Diversity Ch 13 How populations evolve Organisms change over time In baby steps Species (including humans) are descended from other species Two British naturalists, one
More informationChanges through time. Survival of the Fittest
Changes through time Survival of the Fittest Evidence that life has changed and is now changing Fossil Record Fossils are remains or traces of organisms that lived in the past. Fossil Record Fossils are
More information15 Darwin's Theory of Natural Selection 15-1 The Puzzle of Life's Diversity
15-1 The Puzzle of Life's Diversity Study the photo of leaves... What else do you see? How did the Leaf Mantis come to look like decaying leaves? Define evolution in its simplest meaning? Review the meaning
More informationBiology 2017 Mr. Johnson
Class Notes For EVOLUTION Biology 2017 Mr. Johnson Evolution genetic change over time *Theory = explanation based on much evidence (do not confuse with hypothesis ) *Not goal-oriented (can change and
More informationChapter 16 and 17: Evolution Darwin s Voyage of Discovery
Chapter 16 and 17: Evolution Darwin s Voyage of Discovery Father of Evolution:. Born in England (2/12/1809) In 1831, Darwin became a naturalist on the HMS Studied and life on a mapping expedition to South
More informationBiology 20 Evolution
Biology 20 Evolution Evolution: Modern synthesis: Individuals: Lamarck: Use and disuse: Inheritance of Acquired Traits: Darwin: Travelled: Galapagos Islands: What was the name of Darwin s book, which he
More informationStation 1. What is Evolution? What causes Evolution? A primary example of Evolution, is different bird beak sizes. What caused this to occur?
Station 1 What is Evolution? What causes Evolution? A primary example of Evolution, is different bird beak sizes. What caused this to occur? Station 2 What is Survival of the Fittest? How is fitness measured?
More information15-3 Darwin Presents His Case Slide 2 of 41
15-3 Darwin Presents His Case 2 of 41 Publication of On the Origin of Species Publication of On the Origin of Species Darwin filled notebooks with his ideas about species diversity and the evolution process.
More informationChapter 16: Evolutionary Theory
Chapter 16: Evolutionary Theory Section 1: Developing a Theory Evolution: Artificial Selection: Evolution: I. A Theory to Explain Change Over Time B. Charles Darwin C. Theory: D. Modern evolutionary theory
More informationDarwin s Theory of Evolution
Darwin s Theory of Evolution The Puzzle of Life s Diversity Evolution = the process by which modern organisms have descended from ancient organisms. Theory = a well-supported testable explanation of phenomena
More informationNOTES CH 17 Evolution of. Populations
NOTES CH 17 Evolution of Vocabulary Fitness Genetic Drift Punctuated Equilibrium Gene flow Adaptive radiation Divergent evolution Convergent evolution Gradualism Populations 17.1 Genes & Variation Darwin
More informationevolution Multiple Choice Identify the choice that best completes the statement or answers the question.
evolution Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Biologists in Darwin s time had already begun to understand that living things change over time.
More informationBiology. Evolution: History & Process
Biology Evolution: History & Process Terms: A species is a group of organisms, or population, that can be interbreed & produce fertile offspring. Variations are the differences found within species. Ex:
More informationThe Living Environment Unit 4 History of Biologic Diversity Unit 15 Evolution: (15.2) Evidence of Evolution-class key. Name: Class key.
Name: Class key Period: Topic 15.2 assignments Pages/Sections Date Assigned Date Due Topic: Evidence for Evolution Objective: What scientific evidence supports evolution theory? Evidence supporting evolution
More informationTHE THEORY OF EVOLUTION
THE THEORY OF EVOLUTION Name: Period: Date: I. Evolution- A brief overview EVOLUTION IS: 1. 2. Descent with modifications 3. Plants and animals of today are forms of plants and animals of the past 4. Organisms
More informationUNIT XI EVOLUTION Test Friday 2-24
Unit 9: Evolution UNIT XI EVOLUTION Test Friday 2-24 THE THEORY OF EVOLUTION The theory of evolution is one of the most fundamental concepts in Biology. Evolution Is defined as changes in a over population
More informationEVOLUTION. - Selection, Survival, and Drift
EVOLUTION - Selection, Survival, and Drift Evolution Darwin on the HMS Beagle Darwin s role on the ship was as a geologist and companion to the captain. His goal was to collect biological and geological
More informationVERY SIMPLY PUT-- Evolution is. change in a species over time.
EVOLUTION VERY SIMPLY PUT-- Evolution is change in a species over time. How long did it take to CHANGE? 66 million years ago 54 million years ago 37 million years ago 26 million years ago Present Day There
More informationNatural Selection. Factors for Natural Selection: 1. Variation 2. Heritability 3. Overproduction (Overpopulation) 4. Reproductive Advantage
Natural Selection Variation: Heritability: Overproduction: Reproductive Advantage Driven by Environment Factors for Natural Selection: 1. Variation 2. Heritability 3. Overproduction (Overpopulation) 4.
More informationEvolution. Before You Read. Read to Learn
Evolution 15 section 3 Shaping Evolutionary Theory Biology/Life Sciences 7.e Students know the conditions for Hardy-Weinberg equilibrium in a population and why these conditions are not likely to appear
More informationChange Over Time. Evidence for evolution
Change Over Time Evidence for evolution 1. Fossils 2. Geographic Distribution of Living Things 3. Structural Adaptations 4. Physiological Adaptations 5. Anatomy 6. Biochemistry 1. Fossils In biological
More information2. Slight differences among members of the same species that can be inherited Genetic Variation
CP Biology: Evolution Name: Per: Directions: Use your textbook to help you answer the practice questions for each chapter. It is important that you READ the chapter sections and not just search for the
More informationPrinciples of Evolution. Ch Early Ideas About Evolution Early Ideas About Evolution Early Ideas About Evolution 3/21/2016
Principles of Evolution Ch. 10 "Nothing in biology makes sense except in the light of evolution." 10.1 Early Ideas About Evolution The Puzzle of Life s Diversity o Evolution - modern organisms have descended
More informationBiology Slide 1 of 41
Biology 1 of 41 15-3 Darwin Presents His Case 2 of 41 15-3 Darwin Presents His Case Publication of On the Origin of Species Publication of On the Origin of Species Darwin filled notebooks with his ideas
More informationBiology. Slide 1 of 41. End Show. Copyright Pearson Prentice Hall
Biology 1 of 41 15-3 Darwin Presents His Case 2 of 41 Publication of On the Origin of Species Publication of On the Origin of Species Darwin filled notebooks with his ideas about species diversity and
More informationPublication of On the Origin of Species Darwin Presents His Case
Publication of On the Origin of Species Publication of On the Origin of Species Darwin filled notebooks with his ideas about species diversity and the evolution process. Darwin was stunned and disturbed
More information#Evolution. Nothing in Biology makes sense except in the light of evolution.
#Evolution Nothing in Biology makes sense except in the light of evolution. The Theory of Evolution Change over time. People used to think that species did not change. DARWIN WAS NOT THE PERSON TO COME
More informationFYI Charles Darwin. Theory of Evolution. Theory of Evolution. Theory of Evolution. Theory of Evolution. Lamarck s Theory
Mr. Saenz Biology Dept North Pitt High School FYI Charles Darwin Charles Darwin came from a family of doctors, and he almost became one, too. Both his father and grandfather were doctors, and they urged
More informationEvolution. Species Changing over time
Evolution Species Changing over time Charles Darwin Evolution by Means of Natural Selection Reasons for Change Mutation A mutation could cause parents with genes for bright green coloration to have offspring
More informationIntroduction to Evolution
Introduction to Evolution What is evolution? A basic definition of evolution evolution can be precisely defined as any change in the frequency of alleles within a gene pool from one generation to the
More informationChapter 15 Darwin s Theory of Evolution. Essential Question: What evidence did Darwin use to develop his theory of evolution?
Chapter 15 Darwin s Theory of Evolution Essential Question: What evidence did Darwin use to develop his theory of evolution? 15-1 The Puzzle of Life s Diversity How did life change from a prokaryote to
More informationUnit 9 - Evolution Practice Quiz
Unit 9 - Evolution Practice Quiz Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Lamarck s theory of evolution includes the concept that new organs in
More informationEVOLUTION. c. problem: Lamarck did not know how traits were inherited
EVOLUTION I. Evolution accounts for the diversity of life on Earth Evolution = change over time process by which modern organisms have descended from ancient organisms II. Theories of Evolution A. Scientific
More informationDarwin s Theory of Natural Selection
Darwin s Theory of Natural Selection Question: Has Life Ever Changed? In 1700 s, scientists examined fossils that showed how extinct species look very different than they do today. Scientists began to
More informationFinal Revision G8 Biology ( ) Multiple Choice Identify the choice that best completes the statement or answers the question.
Final Revision G8 Biology ( 2017-2018 ) Multiple Choice Identify the choice that best completes the statement or answers the question. 1 A species is a group of similar organisms that A can mate with each
More informationEvolution. Changes over Time
Evolution Changes over Time TEKS Students will analyze and evaluate B. 7 C how natural selection produces change in populations, not individuals B. 7 E/F effects of genetic mechanisms and their relationship
More information16.4 Evidence of Evolution
16.4 Evidence of Evolution Lesson Objectives Explain how geologic distribution of species relates to their evolutionary history. Explain how fossils and the fossil record document the descent of modern
More informationDarwin s Theory of Evolution Chapter 16
Darwin s Theory of Evolution Chapter 16 Darwin & Natural Selection Darwin s journey Darwin s Observations On his voyage, Darwin read Lyell s book As he visited different places, he began to see evidence
More informationCH 16: Evolution of Population
CH 16: Evolution of Population 16.1 Genes and Variation A. Introduction 1. Darwin s theory of evolution by natural selection explained how 2. What Darwin did not know was how were passed down through each
More informationEvolution & Natural Selection
Evolution & Natural Selection Chapter 8 Ideas about the earth & its inhabitants were slowly changing In the 1700 & 1800 s, scientists began to overturn long held beliefs and ideas Buffon suggested the
More informationSBI3U Evolution Unit Test
Knowledge & Understanding Application Thinking & Investigation Communication Total /24 /9 /8 /9 /50 Part A: Multiple Choice Questions (1 mark per question) (K/U) Please circle the letter that corresponds
More informationSince Darwin s work, every scientific test has supported Darwin s basic ideas about evolution
Guided Reading Answers Since Darwin s work, every scientific test has supported Darwin s basic ideas about evolution Biogeography Biogeography is the study of where organisms live now, and where they and
More informationAny evidence of an organism that lived long ago. Sedimentary. Relative Dating. Absolute Dating
A fossil is: Any evidence of an organism that lived long ago Sedimentary Rock Almost all fossils are found in How do scientists determine the age of fossils? Relative Dating Absolute Dating The deeper
More informationEvolution. Evolutionary Thought / Evidence. Video clip: Is evolution a theory? (mousetrap DVD)
Evolution Evolutionary Thought / Evidence Video clip: Is evolution a theory? (mousetrap DVD) Theories of Evolution Evolution - an orderly succession of changes Biological evolution - the change of populations
More information15.3 Darwin Presents his Case. Biology Mr. Hines
15.3 Darwin Presents his Case Biology Mr. Hines Darwin returned to England with a wealth of new data. He brought many specimens from the Galapagos to further his studies and to present his data to others.
More information