Presentation on theme: "10.2 Darwin’s Observations"— Presentation transcript:
110.2 Darwin’s Observations Points to PonderOpen your book to pg. 299Please read about Jean-Baptiste Lamarck and on pg. 4 of your notebook list three of his theories about Evolution
2Jean-Baptiste Lamarck 10.1 Early Ideas About EvolutionJean-Baptiste LamarckAll organisms evolved toward perfection and complexityHe did not think that species became extinct- He thought they evolved into different formsEnvironmental change causes an organism’s behavior to change, which leads to use or disuse of a structurestructure would become smaller or largerwould pass this trait on to offspring, leading to change over time
310.2 Darwin’s Observations Analyze this picture of a baleen whale. Using the ideas of Jean-Baptiste Lamarck (pg. 299) tell me why this whale has a pelvis and a femur.PELVISFEMURPELVISFEMUR
9Set up Cornell Notes on pg. 5 Topic: 10.2 Darwin’s ObservationsEssential Question:(p.4) Make a double- bubble map comparing and contrasting variation and adaptation (give examples of each)10.2 Darwin’s Observations2.1 Atoms, Ions, and Molecules(p.4) Make a double-bubble map comparing and contrasting variation and adaptation (give examples of each)
1110.2 Darwin’s Observations Meet Charles DarwinEducated in Natural HistoryHired on the HMS Beagle as the ship’s naturalistHe collected many organismsHe formulated the idea that each species had developed from ancestors with similar features
12The Voyage of the Beagle 10.2 Darwin’s ObservationsThe Voyage of the BeagleIn 1831 The HMS Beagle set sailThe voyage took 5 yearsHe read Lyell’s Principles of GeologyDarwin spent most of his time on shore observing species, where he found much evidence supporting Lyell’s views
1310.2 Darwin’s Observations Darwin noticed the variation of traits among similar species that he observed in his travels…Variation- is the difference in the physical traits of an individual from those of other individuals in the group to which it belongs
1410.2 Darwin’s Observations Interspecific variationVariation among different speciesIntraspecific variationVariation among the same species
1710.2 Darwin’s Observations During Darwin’s journey he noticed that the differences among the species seemed well suited to the animals’ environment and dietDiscuss giraffes.These observations led Darwin to realize that species may somehow be able to adapt to their surroundings
1810.2 Darwin’s Observations An adaptation is a feature that allows an organism to better survive in its environment.Species are able to adapt to their environment.Adaptations can lead to genetic change in a population.
1910.2 Darwin’s Observations What adaptations do these animals have? Why do they need those adaptations?CamelCheetahMountain GoatGiraffe
20Please come up with your own animal and adaptation 10.2 Darwin’s ObservationsPlease come up with your own animal and adaptationWhat is the name of the animal?What is its adaptation?Why does it need that/those adaptation(s)?food?camouflage?
2110.2 Darwin’s Observations Compare these two tortoises. Note their looks and think about what type of food they would be able to eat.
22Darwin observed differences among island species. 10.2 Darwin’s ObservationsDarwin observed differences among island species.Saddle-back tortoises that live in areas with tall plantshave long necks and legsDomed tortoises live in wet areas rich in mosses and short plantshave shorter necks and legs
2310.2 Darwin’s Observations Darwin observed fossil and geologic evidence supporting an ancient Earth.Darwin found fossils of extinct animals that resemble modern animals.GlyptodonArmadillo
2410.2 Darwin’s Observations Darwin found fossil shells high up in the Andes mountains.Darwin observed an EarthquakeHe saw land move from underwater to above sea levelSupported the theory that small daily geologic activity can lead to great changes over timeDarwin extended his observations to the evolution of organisms.
25Variation vs. Adaptation Poster Please create a "Variation vs. Adaptation" Poster 1. Split your poster into four squares Box #1: Interspecific variation Box #2: Intraspecific variation Box #3: Animal Adaptation #1 Box #4: Animal Adaptation #2 2. In each box draw a picture that demonstrates either the type of variation or animal adaptation. 3. Explain each picture and how it relates to either variation or adaptation: what are their specialized adaptations, what are they used for? Edmodo Directions (Comic Life/Pages/Keynote) PDF!!!!!: 1. Find two examples that demonstrate variation (2 interspecific, 2 intraspecific) 2. Explain what variation is, and the two types 3. Find four examples of animals with specialized adaptations 4. Explain each animal and what their adaptations are, and what they are used for
26Interspecific Variation vs.Polar BearGrizzly Bearvs.Blue WhaleKiller WhaleInterspecific variation: is variation among individuals of different species