Adaptation and Change

Size: px
Start display at page:

Download "Adaptation and Change"

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 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 information

The slow, gradual change in a population of organisms over time

The 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 information

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 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 information

Vocab. ! 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 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 information

EVOLUTION change in populations over time

EVOLUTION 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 information

EVOLUTION change in populations over time

EVOLUTION 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 information

Lab 2A--Life on Earth

Lab 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 information

ADAPTATIONS. Characteristics that give an organism a better chance of survival.

ADAPTATIONS. 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 information

Evolution. Just a few points

Evolution. 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 information

Chapter 16. Darwin s Theory Of Evolution

Chapter 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 information

Boardworks Ltd Evolution

Boardworks 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 information

EVOLUTION. 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. 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 information

Outline. Evolution: Evidence, Selection and Adaptation. Key Concepts: One of the key words of our modern time is Evolution

Outline. 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 information

Theory of Evolution. Mr. Rafferty 5-19

Theory 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 information

Natural Selection. Charles Darwin & Alfred Russell Wallace

Natural 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 information

THE THEORY OF EVOLUTION

THE 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 information

8.1 Scientific Contribution to a Theory of Evolution

8.1 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 information

EVOLUTION. Charles Darwin

EVOLUTION. 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 information

Biology Chapter 15 Evolution Notes

Biology 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 information

19. When allele frequencies change as a result of the migration of a small subgroup of a population

19. 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 information

5/31/2012. Speciation and macroevolution - Chapter

5/31/2012. 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 information

15 Darwin's Theory of Natural Selection. Publication of The Origin of Species

15 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 information

Multiple Choice Write the letter on the line provided that best answers the question or completes the statement.

Multiple 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 information

Evolution Notes Darwin and His Ideas

Evolution 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 information

Charles Darwin and Natural Selection Notes. Biology - Ms. Spinale/Mrs. Kaye

Charles 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 information

of EVOLUTION???????????? states that existing forms of life on earth have arisen from earlier forms over long periods of time.

of 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 information

NOTES Ch 17: Genes and. Variation

NOTES 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 information

EQ: 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? 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 information

Study 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 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 information

Please 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 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 information

Natural 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 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 information

Homework. 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! 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 information

4.2 Developing a Theory to Explain Change

4.2 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 information

How did the variety of Living things on earth come about?

How 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 information

Evolution. Formation of EARTH. First cells by endosymbiosis. The Scientists. Lamarck Darwin. Change Over Time

Evolution. 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 information

THE HISTORY OF THE THEORY. Darwin presented that happens and offered an of how it happens. Theory a broad that has been and

THE 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 information

This image cannot currently be displayed. Unit 5 - Evolution 2. Mr.Yeung

This 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 information

Evolution and Natural Selection

Evolution 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 information

15-1 The Puzzle of Life's Diversity Slide 1 of 20

15-1 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 information

1/30/2012. Review. Speciation and macroevolution - Chapter

1/30/2012. 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 information

Evolution. Chapters 16 & 17

Evolution. 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 information

15 Darwin's Theory of Natural Selection 15-1 The Puzzle of Life's Diversity

15 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 information

Theory 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. 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 information

Evolution. 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. 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 information

Biology 11 UNIT 1: EVOLUTION LESSON 1: WHY EVOLUTION?? TEXTBOOK: UNIT 5

Biology 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 information

Biology. Evolution: History & Process

Biology. 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 information

Unit 8: EVOLUTION NOTES

Unit 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 information

What is Evolution? Evolution Unit Vocabulary. Answer: Evidence of Evolution. What is a Gene Pool? Change over time.

What 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 information

Darwin and Natural Selection

Darwin 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 information

Biology 3201 Unit 4 Evolution Ch Introducing Evolution (part 1) What is Evolution?

Biology 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 information

Evidence for EVOLUTION

Evidence 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 information

Guided 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? 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 information

NOTES CH 17 Evolution of. Populations

NOTES 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 information

Darwin s Observations & Conclusions The Struggle for Existence

Darwin 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 information

Darwin s Theory of Evolution. The Puzzle of Life s Diversity

Darwin 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 information

Changes Over Time EVOLUTION

Changes 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 information

Along his journey, Darwin kept notes on the variation in different species. His book, Origin of Species, outlined his findings & theories in 1859.

Along 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 information

Who 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 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 information

Genes and DNA. 1) Natural Selection. 2) Mutations. Darwin knew this

Genes 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 information

Computer 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 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 information

CHAPTER 2--THE DEVELOPMENT OF EVOLUTIONARY THEORY

CHAPTER 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 information

Boardworks Ltd The first wellknown. evolution:

Boardworks 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 information

16.1 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. 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 information

Evolution. Evolutionary Thought / Evidence. Video clip: Is evolution a theory? (mousetrap DVD)

Evolution. 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 information

Biology Slide 1 of 41

Biology 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 information

Charles Darwin became a naturalist, a scientist who studies nature, during a voyage on the British ship HMS Beagle.

Charles 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 information

Biology. Slide 1 of 41. End Show. Copyright Pearson Prentice Hall

Biology. 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 information

Publication of On the Origin of Species Darwin Presents His Case

Publication 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

VERY SIMPLY PUT-- Evolution is. change in a species over time.

VERY 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 information

GAUTENG DEPARTMENT OF EDUCATION SENIOR SECONDARY INTERVENTION PROGRAMME LIFE SCIENCES GRADE 12 SESSION 4 (LEARNER NOTES)

GAUTENG 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 information

What is Natural Selection? Natural & Artificial Selection. Answer: Answer: What are Directional, Stabilizing, Disruptive Natural Selection?

What 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 information

1. E, or change over time, is the process by which modern organisms have descended from ancient organisms

1. 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 information

Natural Selection and Evolution

Natural 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 information

IV. Natural Selection

IV. 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 information

Biology 2017 Mr. Johnson

Biology 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 information

Speciation and Patterns of Evolution

Speciation 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 information

How to Use This Presentation

How 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 information

EVOLUTION & SPECIATION

EVOLUTION & 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 information

Genetic Changes Lesson 2 HW

Genetic 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 information

Are individuals in a population of a species the same?

Are 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 information

natural selection evolution

natural 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 information

4. Identify one bird that would most likely compete for food with the large tree finch. Support your answer. [1]

4. 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 information

LIFE SCIENCE CHAPTER 7 FLASHCARDS

LIFE 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 information

It all depends on barriers that prevent members of two species from producing viable, fertile hybrids.

It 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. #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 information

EVOLUTION. c. problem: Lamarck did not know how traits were inherited

EVOLUTION. 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 information

EVOLUTION 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. 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 information

Chapter 16: Evolutionary Theory

Chapter 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 information

Charles Darwin and Evolution

Charles 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 information

Biological Evolution

Biological 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 information

Origin of an idea about origins

Origin 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 information

Evolution. Early Beliefs

Evolution. 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 information

Evolution. Darwin s Journey and Observations

Evolution. 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 information

Introduction to Evolution

Introduction 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 information

EVOLUTION. Evolution - changes in allele frequency in populations over generations.

EVOLUTION. 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 information

The Origin of Species

The 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 information

The Origin of Species

The 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 information

EvolutionIntro.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.

EvolutionIntro.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 information

Biology II. Evolution

Biology 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 information

EVOLUTIONARY 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 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