change over time. learning objectives describe how darwin’s observations helped him to develop...
TRANSCRIPT
![Page 1: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/1.jpg)
Change Over TimeChange Over Time
![Page 2: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/2.jpg)
Learning ObjectivesLearning Objectives Describe how Darwin’s observations helped him to
develop his hypothesis. Explain the process of natural selection and how it
contributes to evolution.
![Page 3: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/3.jpg)
Who Was Charles Darwin?Who Was Charles Darwin?In 1839, Charles Darwin published his book The Voyage of the Beagle.
• Helped him develop one of the most important scientific theories of all time.
![Page 4: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/4.jpg)
Scientific TheoryScientific Theory• A well tested concept that explains a wide range of
observations
![Page 5: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/5.jpg)
Darwin’s HypothesisDarwin’s HypothesisDarwin was a naturalist—someone who observes and studies the natural world.
Modern-day sloth
Giant ground sloth
![Page 6: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/6.jpg)
The Galápagos OrganismsThe Galápagos Organisms
Darwin became convinced that species do not always stay the same.
Galápagos Island iguana Mainland iguana
![Page 7: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/7.jpg)
The Galápagos FinchesThe Galápagos FinchesThe structure of the Galápagos finch beaks is an adaptation to the type of food each bird eats.
![Page 8: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/8.jpg)
Selective BreedingSelective Breeding• In Selective Breeding only the organisms with a
desired characteristic are bred.
![Page 9: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/9.jpg)
Natural SelectionNatural SelectionThe process by which individuals that are better adapted to their environment are more likely to survive and reproduce
![Page 10: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/10.jpg)
Three main points of natural selectionThree main points of natural selection• Overproduction
• Competition
• Variation
![Page 11: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/11.jpg)
OverproductionOverproductionDarwin observed that most species produce far more offspring than can survive.
In many species there’s not enough resources, food, water, and living space.
![Page 12: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/12.jpg)
CompetitionCompetition• Food , space, and other resources are limited, so
members of species must compete for survival
• Competition is not always physical, it is usually indirect.
• Ex. Some turtles are better at finding food then others
• A slower turtles may be caught by a predator while a faster one can escape.
![Page 13: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/13.jpg)
VariationVariation• Any difference between individuals of the same
species.
Ex. Sea turtles may differ in color, size, the ability to swim quickly, and shell hardness
![Page 14: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/14.jpg)
Natural SelectionNatural Selection
Overproduction Competition Variation
• Examine the sequence below that shows how natural selection could affect a group of sea turtles over time.
![Page 15: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/15.jpg)
SpeciesSpecies• A group of similar organisms that can mate with
each other and produce offspring.
![Page 16: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/16.jpg)
AdaptationAdaptationAdaptation – an inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment
![Page 17: Change Over Time. Learning Objectives Describe how Darwin’s observations helped him to develop his hypothesis. Explain the process of natural selection](https://reader035.vdocuments.mx/reader035/viewer/2022062221/56649ef15503460f94c02547/html5/thumbnails/17.jpg)
Change Over Time OverviewChange Over Time Overview1. An adaptation is a trait that increases an organism’s ability
to and .
2. The different shapes of bird beaks are examples of .
survive reproduce
adaptation
survive natural selection evolution competitionreproduce adaptation