Adaptation and Change
|
|
- Osborn Cain
- 5 years ago
- Views:
Transcription
1 Adaptation and Change
2 An adaptation is any structure or behavioral trait that improves an organism's success at reproducing and surviving.
3 Most adaptations serve one of three purposes: 1. help an organism get food.
4 2. prevent an organism from becoming food for another organism.
5 3. help an organism reproduce.
6 Jean-Baptise de Lamarck Before the 18th century people believed that earth and living things existed unchanged since the beginning of time. In the early 1800s, Lamarck presented the first theory that recognized the possibility of evolution:
7 organisms desired to become more complex and change for the better. organisms could produce new or improved parts to be better adjusted to their environment. the use and disuse of parts would be passed onto the offspring.
8 Lamarck used his model to explain how giraffes got such long necks: Giraffes started out with short necks, but soon low tree leaves were removed. They had to stretch to reach the higher leaves.
9 All the neck stretching meant that the next generation of giraffes was born with longer necks that could reach more food.
10 Lamarck tried to prove his theory by cutting off the tails of mice and breeding them to see if their offspring were born with tails. The experiment failed We study his theory because although he was wrong, he did get people thinking about adaptations.
11 Thomas Malthus Said that populations remain quite stable due to natural checks and balances such as limited resources and disease.
12 His ideas were very influential on Charles Darwin. Populations would grow until the food supply ran out
13 Charles Darwin Darwin travelled aboard HMS Beagle on its 5- year mission around the world.
14 His observations on his trip led to the development of his theory of natural selection. This theory is based on three main points:
15 1. Organisms usually produce more offspring than can survive.
16 Video time!
17 2. There is variation among individuals in a population.
18 Variations in humans Blood type Ear lobe attached or not Curl the tongue
19 Organisms compete for limited resources: Between members of the same species And different species
20
21 From the many organisms that are born, only those individuals that are best adapted to their environment are likely to survive.
22 The best adapted individuals in the population are considered the most fit because they are able to pass on their traits to more offspring. Some shouldn t reproduce
23 This theory also became known as 'The Survival of the Fittest'. Biological fitness is a measure of how many offspring an individual has.
24 Alfred Russell Wallace Darwin kept his theory to himself for over 20 years. He did not publish his theory until Wallace sent Darwin a paper that had a very similar conclusion to Darwin. Darwin and Wallace presented their work together to the scientific community in 1858 (but Darwin gets most of the credit for the theory).
25 In 1859, Darwin published his book The Origin of Species in which he described his theory of natural selection. The entire first printing of his book sold out on its first day of publication.
26 His book said that: all life on earth shared a common ancestor and that a population could change over time to produce new species. His theory was very controversial and cartoons like these were common
27 How do new species get Species- organisms that are capable of interbreeding to produce fertile offspring. produced? A liger, the offspring of a male lion and a female tiger. It can t reproduce (sterile).
28 A baby zonkey : zebra-donkey hybrid.
29 1. Variation in a species Changes in the environment drive the process of natural selection. Variation in a species must be present before a change in the environment happens.
30 Variation is caused by mutations (small copying errors in DNA).
31 Belgian Blue cattle, 1 gene mutated to produce very large muscles Mutations can be helpful, harmful or have no effect on the organism
32 Evolution is usually a very slow process caused by the accumulation of inherited variation No mutations = no variation so when the environment changes extinction
33 DNA Genes Chromosomes Our genes determine our traits Sexual reproduction produces far more variation than asexual reproduction Sex can introduce new gene combinations into a population and is an important source of genetic variation.
34 2. Isolation In order for a group of organisms to develop and be distinct from other members of their species they must be isolated so they can adapt to their own habitats in their own way. Isolation restricts the gene pool and encourages mutations. Two populations become different species when they can no longer interbreed.
35 Two types of Isolation: Geographic Isolation: two groups are separated by changes to habitat. E.g. separating continents, volcanic activity, rivers, etc.
36 part of Taylor Glacier, the Blood Falls, in Antarctica. a lake was covered by the glacier about 2 million years ago, trapping the microbes inside. They evolved independently of outside life for all that time, and were discovered due to a few leaks from under the glacier.
37 2. Reproductive Isolation Organisms no longer breed naturally. E.g. different mating rituals. Although individuals living close together within each species can interbreed, as distance increases, fertility decreases. These frogs are now considered to be 4 different species. The mating calls of each species differ, and defective embryos occur between certain combinations.
38 Adaptive Radiation The evolution of a group of organisms from a single ancestral species into several new species, each specialized into its own specific niche. This often happens on newly formed islands. E.g. Hawaii or Galapagos Hawaiian Honeycreepers
39
Darwin 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 informationThe slow, gradual change in a population of organisms over time
The slow, gradual change in a population of organisms over time SB5. Students will evaluate the role of natural selection in the development of the theory of evolution. acquired characteristics inherited
More informationChapter 2 Section 1 discussed the effect of the environment on the phenotype of individuals light, population ratio, type of soil, temperature )
Chapter 2 Section 1 discussed the effect of the environment on the phenotype of individuals light, population ratio, type of soil, temperature ) Chapter 2 Section 2: how traits are passed from the parents
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 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 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 informationLab 2A--Life on Earth
Lab 2A--Life on Earth Geology 1402 Chapters 3 & 7 in the textbook 1 A comment Many people including professional scientist are skeptical of evolution or outright reject it. I am not attempting to change
More informationADAPTATIONS. Characteristics that give an organism a better chance of survival.
ADAPTATIONS Characteristics that give an organism a better chance of survival. Special traits that help living organisms survive in a particular environment. Ex: Polar bear s thick white fur keeps him
More informationEvolution. Just a few points
Evolution Just a few points Just What is a Species??? Species: a group of organisms that share similar characteristics can interbreed with one another produce fertile offspring Population: One species
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 informationBoardworks Ltd Evolution
1 of 34 Boardworks Ltd 2011 Evolution 2 of 34 Boardworks Ltd 2011 Life on earth 3 of 34 Boardworks Ltd 2011 Life on earth began approximately 3,500 million years ago. What do you think the earliest life
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 informationOutline. Evolution: Evidence, Selection and Adaptation. Key Concepts: One of the key words of our modern time is Evolution
Evolution: Evidence, Selection and Adaptation One of the key words of our modern time is Evolution u 1. Key concepts Outline u 2. Early Beliefs, and New Discoveries u 3. Darwin developed the theory of
More informationTheory of Evolution. Mr. Rafferty 5-19
Theory of Evolution Mr. Rafferty 5-19 Theories of Evolution Theories of Evolution attempt to explain how the similarities and differences among species came about. Early theories stated that new species
More informationNatural Selection. Charles Darwin & Alfred Russell Wallace
Natural Selection Charles Darwin & Alfred Russell Wallace Darwin s Influences Darwin observed such variations in species on his voyage as a naturalist on the HMS Beagle Darwin s Influences Kept vast diaries
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 information8.1 Scientific Contribution to a Theory of Evolution
8.1 Scientific Contribution to a Theory of Evolution SBI3U MS. DE SOUSA Georges- Louis Leclerc (1707-1788) Challenged the idea that life forms were unchanging. He noticed similarities between humans and
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 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 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 information5/31/2012. Speciation and macroevolution - Chapter
Speciation and macroevolution - Chapter Objectives: - Review meiosis -Species -Repro. Isolating mechanisms - Speciation -Is evolution always slow -Extinction How Are Populations, Genes, And Evolution Related?
More information15 Darwin's Theory of Natural Selection. Publication of The Origin of Species
Publication of The Origin of Species -He continued observing the specimens he collected and thinking about natural selection, but kept it to himself for the next 20 YEARS! -In 1858, he received a manuscript
More informationMultiple Choice Write the letter on the line provided that best answers the question or completes the statement.
Chapter 15 Darwin s Theory of Evolution Chapter Test A Multiple Choice Write the letter on the line provided that best answers the question or completes the statement. 1. On the Galápagos Islands, Charles
More informationEvolution Notes Darwin and His Ideas
Evolution Notes Darwin and His Ideas Charles Darwin Charles Darwin was born in 1809 (on the same day as Abraham Lincoln) In Darwin s day, scientists were just starting to come around to the idea the Earth
More informationCharles Darwin and Natural Selection Notes. Biology - Ms. Spinale/Mrs. Kaye
Charles Darwin and Natural Selection Notes Biology - Ms. Spinale/Mrs. Kaye Charles Darwin In 1831, Charles Darwin set sail on the HMS Beagle. He was 22 years old. His journey lasted for 5 years. He collected
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 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 informationEQ: How are genetic variations caused and how do they lead to natural selection?
EQ: How are genetic variations caused and how do they lead to natural selection? What is natural selection Individuals that have physical or behavioral traits that better suit their environment are more
More informationStudy guide for test on end of chapter 2 and beginning of chapter 3
Study guide for test on end of chapter 2 and beginning of chapter 3 Chapter 2 questions: You should review: 1. 2 sets of notes: Evidence for Evolution (be able to name 3 of the 5) and What can affect evolution
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 informationNatural Selection. Professor Andrea Garrison Biology 3A Illustrations 2011 Pearson Education, Inc., unless otherwise noted
Natural Selection Professor Andrea Garrison Biology 3A Illustrations 2011 Pearson Education, Inc., unless otherwise noted Natural Selection Mechanism for change in species over time Proposed by Charles
More informationHomework. Antibiotic Resistance article and questions Study evolution flash cards for Vocab quiz on Friday!
Homework Antibiotic Resistance article and questions Study evolution flash cards for Vocab quiz on Friday! Learning Targets I can explain the theory of natural selection with an example. I can describe
More information4.2 Developing a Theory to Explain Change
4.2 Developing a Theory to Explain Change In this section, you will: Compare different explanations for changes in populations over time Describe evidence to support the theory of evolution Explain how
More informationHow did the variety of Living things on earth come about?
How did the variety of Living things on earth come about? Many hypothesis: 1. Religious view that the earth was created along with all the living things in it at most 10,000 years old 2. Georges Buffon
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 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 informationThis image cannot currently be displayed. Unit 5 - Evolution 2. Mr.Yeung
This image cannot currently be displayed. Unit 5 - Evolution 2 Mr.Yeung Who is Charles Darwin? Charles Darwin (1809 1882) English lad Has a degree in Theology from Christ s College in Cambridge Was a naturalist
More informationEvolution and Natural Selection
Evolution and Natural Selection What Evolution is NOT Change in a gene pool over time What Evolution IS Evolution unites all fields of biology! Cell biology Genetics/DNA Ecology Biodiversity/Taxonomy Carolus
More information15-1 The Puzzle of Life's Diversity Slide 1 of 20
1 of 20 Evolution is the process by which modern organisms have descended from ancient organisms. * Known as biological change over time A scientific theory is a well-supported testable explanation of
More information1/30/2012. Review. Speciation and macroevolution - Chapter
Speciation and macroevolution - Chapter Objectives: - Review meiosis -Species -Repro. Isolating mechanisms - Speciation -Is evolution always slow -Extinction Review Meiosis: division of cells that results
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 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 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. In the 18 th century, people became more mobile. Lamarck. Organisms acquire characteristics and pass them on WRONG!!!
Evolution In the 18 th century, people became more mobile Why are the different animals and plants in different geographic areas? How do we explain this diversity? As fossils were discovered: why don t
More informationBiology 11 UNIT 1: EVOLUTION LESSON 1: WHY EVOLUTION?? TEXTBOOK: UNIT 5
Biology 11 UNIT 1: EVOLUTION LESSON 1: WHY EVOLUTION?? TEXTBOOK: UNIT 5 Objectives: By the end of the lesson you should be able to: Explain why DNA is so important to the theory of evolution State the
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 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? 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 informationDarwin and Natural Selection
Darwin and Natural Selection Background: Students know Evolution is change over time Essential Question: What was Darwin s conclusion about his observations? (CIRCLE ans. ) Vocabulary: Highlight or underline
More informationBiology 3201 Unit 4 Evolution Ch Introducing Evolution (part 1) What is Evolution?
Biology 3201 Unit 4 Evolution Ch. 19 - Introducing Evolution (part 1) What is Evolution? Evolution: the relative change in the characteristics of a population over successive generations A population is
More informationEvidence for EVOLUTION
Evidence for EVOLUTION Fossils A fossil is the naturally preserved remains or traces of animals or plants that lived in the geologic past. There are two main types of fossils; body and trace. Body fossils
More informationGuided Questions. Who first suggested evolution? Who first suggested creationism? What did humans evolve from?
Guided Questions Who first suggested evolution? Who first suggested creationism? What did humans evolve from? Evolution The Darwinian View of Life The Importance of Evolution This is the most important
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 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 informationDarwin s Theory of Evolution. The Puzzle of Life s Diversity
Darwin s Theory of Evolution The Puzzle of Life s Diversity Evolutionary Theory A scientific explanation that can illustrate the diversity of life on Earth Theory A well-supported, testable explanation
More informationChanges Over Time EVOLUTION
Changes Over Time EVOLUTION Charles Darwin The Father of Evolution History Darwin s World (1809-1875) Height of the British colonial period. Beginning of the Industrial Revolution. New Ideas: Taxonomy
More informationAlong his journey, Darwin kept notes on the variation in different species. His book, Origin of Species, outlined his findings & theories in 1859.
CHARLES DARWIN Born February 12, 1809 At the age of 16 entered medical school in England and flunked out His dad sent him to Univ. of Cambridge in 1827 to study divinity 1831: Darwin left Cambridge and
More informationWho developed the theory of acquired characteristics? a. Darwin b. Lamarck c. Charles Lyell d. Aristotle
Who developed the theory of acquired characteristics? a. Darwin b. Lamarck c. Charles Lyell d. Aristotle 1 Who developed the theory of natural selection, and survival of the fittest? a. Darwin b. Lamarck
More informationGenes and DNA. 1) Natural Selection. 2) Mutations. Darwin knew this
1) Natural Selection The mechanism (driving force) for evolution, as explained by Charles Darwin. Explains changes in an entire species or population (not individuals) over time. 2) Mutations Random changes
More informationComputer Simulations on Evolution BiologyLabs On-line. Laboratory 1 for Section B. Laboratory 2 for Section A
Computer Simulations on Evolution BiologyLabs On-line Laboratory 1 for Section B Laboratory 2 for Section A The following was taken from http://www.biologylabsonline.com/protected/evolutionlab/ Introduction
More informationCHAPTER 2--THE DEVELOPMENT OF EVOLUTIONARY THEORY
CHAPTER 2--THE DEVELOPMENT OF EVOLUTIONARY THEORY Student: 1. In Europe during the Middle Ages, it was believed that. A. all species had evolved from a common ancestor B. evolution was the result of natural
More informationBoardworks Ltd The first wellknown. evolution:
1 of 7 2 of 7 The first wellknown theory of evolution: 3 of 7 Lamarck s theory of evolution: The Theory of Use/Disuse and Acquired Traits Jean-Baptiste Lamarck (1744-1829) was a French botanist who believed
More information16.1 Darwin s Voyage of Discovery Lesson Objectives State Charles Darwin s contribution to science.
16.1 Darwin s Voyage of Discovery Lesson Objectives State Charles Darwin s contribution to science. Describe the three patterns of biodiversity noted by Darwin. Darwin s Epic Journey 1. THINK VISUALLY
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 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 informationCharles Darwin became a naturalist, a scientist who studies nature, during a voyage on the British ship HMS Beagle.
Theory of Evolution Darwin s Voyage What did Darwin observe? Charles Darwin became a naturalist, a scientist who studies nature, during a voyage on the British ship HMS Beagle. On his journey, Darwin observed
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 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 informationGAUTENG DEPARTMENT OF EDUCATION SENIOR SECONDARY INTERVENTION PROGRAMME LIFE SCIENCES GRADE 12 SESSION 4 (LEARNER NOTES)
TOPIC 2: THEORIES OF EVOLUTION (PART 1) Learner Note: Evolution is a theory. Evolution is change over time. Diversity is the RESULT of this change over time. If a trait is good, the organism survives and
More informationWhat is Natural Selection? Natural & Artificial Selection. Answer: Answer: What are Directional, Stabilizing, Disruptive Natural Selection?
What is Natural Selection? Natural & Artificial Selection Practice Quiz What are Directional, Stabilizing, Disruptive Natural Selection? When an environment selects for a trait in organisms. Who came up
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 informationNatural Selection and Evolution
Natural Selection and Evolution Our plant has been evolving from its simplest beginnings into a vast range of organisms present today This has happened by natural selection Natural Selection and Evolution
More informationIV. Natural Selection
IV. Natural Selection A. Important points (1) Natural selection does not cause genetic changes in individuals (2) Change in allele frequency occurs in populations (3) Fitness!" Reproductive Success = survival
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 informationSpeciation and Patterns of Evolution
Speciation and Patterns of Evolution What is a species? Biologically, a species is defined as members of a population that can interbreed under natural conditions Different species are considered reproductively
More informationHow to Use This Presentation
How to Use This Presentation To View the presentation as a slideshow with effects select View on the menu bar and click on Slide Show. To advance through the presentation, click the right-arrow key or
More informationEVOLUTION & SPECIATION
EVOLUTION & SPECIATION Page 2 VOCABULARY REVIEW NEW VOCABULARY EVOLUTION CHANGE OVER TIME NATURAL SELECTION - INDIVIDUALS BETTER ADAPTED TO THE ENVIRONMENT ARE ABLE TO SURVIVE & REPRODUCE. A.K.A. SURVIVAL
More informationGenetic Changes Lesson 2 HW
Guiding Question What theory serves as the basis of what we believe about how evolutionary changes occur? 7 th GRADE SCIENCE Genetic Changes Lesson 2 HW # Name: Date: Homeroom: Jean-Baptiste Lamarck (1744-1829)
More informationAre individuals in a population of a species the same?
LEARNING OUTCOMES Define the term variation. Discuss the fact that variation occurs within, as well as between, species. Describe the differences between continuous and discontinuous variation, using examples
More informationnatural selection evolution
Honors Biology Bellringer: signintoaclicker! natural selection evolution Standard: Students will evaluate the role of natural selection in the development of the theory of evolution. Element: a. Trace
More information4. Identify one bird that would most likely compete for food with the large tree finch. Support your answer. [1]
Name: Topic 5B 1. A hawk has a genetic trait that gives it much better eyesight than other hawks of the same species in the same area. Explain how this could lead to evolutionary change within this species
More informationLIFE SCIENCE CHAPTER 7 FLASHCARDS
LIFE SCIENCE CHAPTER 7 FLASHCARDS What did Darwin NOT understand about the process of evolution? A. the slowness of the process B. the role of genetics C. the importance of separation D. the importance
More informationIt all depends on barriers that prevent members of two species from producing viable, fertile hybrids.
Name: Date: Theory of Evolution Evolution: Change in a over a period of time Explains the great of organisms Major points of Origin of Species Descent with Modification o All organisms are related through
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 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 informationEVOLUTION BY NATURAL SELECTION. This presentation contains copyrighted material under the educational fair use exemption to the U.S. copyright law.
EVOLUTION BY NATURAL SELECTION This presentation contains copyrighted material under the educational fair use exemption to the U.S. copyright law. Ancient ideas of evolution! Plato! Every organism was
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 informationCharles Darwin and Evolution
Charles Darwin and Evolution from so simple a beginning, endless forms most beautiful and most wonderful have been, and are being, evolved. On the Origin of Species I. Darwin s Travels 1. In 1831, Charles
More informationBiological Evolution
Biological Evolution What is Evolution Evolution is descent with modification Microevolution = changes in gene (allele) frequency in a population from one generation to the next Macroevolution = descent
More informationOrigin of an idea about origins
Origin of an idea about origins Biological evolution is the process of change during the course of time because of the alteration of the genotype and the transfer of these altered genes to the next generation.
More informationEvolution. Early Beliefs
Early Beliefs Evolution Chain of Beings- Life extended from lowest forms to humans, spiritual beings were highest. Single Creation- All species were links created at the same time at one center of creation.
More informationEvolution. Darwin s Journey and Observations
Evolution Darwin s Journey and Observations Who was Charles Darwin? English naturalist Took a 5 year voyage on the HMS Beagle Voyage s intent was to explore the coast of South America Darwin took many
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 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 informationThe Origin of Species
The Origin of Species Chapter 24 Both in space and time, we seem to be brought somewhere near to that great fact the mystery of mysteries-the first appearance of beings on Earth. Darwin from his diary
More informationThe Origin of Species
The Origin of Species Chapter 24 Both in space and time, we seem to be brought somewhere near to that great fact the mystery of mysteries-the first appearance of beings on Earth. Darwin from his diary
More informationEvolutionIntro.notebook. May 13, Do Now LE 1: Copy Now. May 13 12:28 PM. Apr 21 6:33 AM. May 13 7:22 AM. May 13 7:00 AM.
Different interpretations of cetacean evolutionary history 4/19/10 Aim: What is Evolution by Natural Selection Do Now: How do we know all life on earth is related? Homework Read pp. 375 379 p. 379 # 1,2,3
More informationBiology II. Evolution
Biology II Evolution Observation-Something we know to be true based on one or more of our five senses. Inference- A conclusion which is based on observations Hypothesis- a testable inference usually stated
More informationEVOLUTIONARY THEORY Evolution affects EVERY living thing All life is descended from the Original Life Form: Ur-slime DARWIN figured out how it could
EVOLUTIONARY THEORY Evolution affects EVERY living thing All life is descended from the Original Life Form: Ur-slime DARWIN figured out how it could happen Had 100 years of precedents Natural History Hobby
More information