Presentation on theme: "10.2 Darwin’s Observations Points to Ponder Open your book to pg. 299 Please read about Jean-Baptiste Lamarck and on pg. 4 of your notebook list three."— Presentation transcript:
10.2 Darwin’s Observations Points to Ponder Open your book to pg. 299 Please read about Jean-Baptiste Lamarck and on pg. 4 of your notebook list three of his theories about Evolution
10.1 Early Ideas About Evolution Jean-Baptiste Lamarck All organisms evolved toward perfection and complexity He did not think that species became extinct- He thought they evolved into different forms Environmental change causes an organism’s behavior to change, which leads to use or disuse of a structure –structure would become smaller or larger –would pass this trait on to offspring, leading to change over time
10.2 Darwin’s Observations FEMUR PELVIS 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. PELVIS FEMUR
Set up Cornell Notes on pg. 5 Topic: 10.2 Darwin’s Observations Essential Question: 1.(p.4) Make a double- bubble map comparing and contrasting variation and adaptation (give examples of each) 2.1 Atoms, Ions, and Molecules 10.2 Darwin’s Observations 1.(p.4) Make a double-bubble map comparing and contrasting variation and adaptation (give examples of each)
10.2 Darwin’s Observations Meet Charles Darwin Educated in Natural History Hired on the HMS Beagle as the ship’s naturalist He collected many organisms He formulated the idea that each species had developed from ancestors with similar features
10.2 Darwin’s Observations The Voyage of the Beagle In 1831 The HMS Beagle set sail The voyage took 5 years He read Lyell’s Principles of Geology Darwin spent most of his time on shore observing species, where he found much evidence supporting Lyell’s views
10.2 Darwin’s Observations Variation- is the difference in the physical traits of an individual from those of other individuals in the group to which it belongs Darwin noticed the variation of traits among similar species that he observed in his travels…
10.2 Darwin’s Observations Interspecific variation Variation among different species Intraspecific variation Variation among the same species
During Darwin’s journey he noticed that the differences among the species seemed well suited to the animals’ environment and diet Discuss giraffes. These observations led Darwin to realize that species may somehow be able to adapt to their surroundings
10.2 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.
10.2 Darwin’s Observations What adaptations do these animals have? Why do they need those adaptations? Camel Cheetah Giraffe Mountain Goat
10.2 Darwin’s Observations Please come up with your own animal and adaptation What is the name of the animal? What is its adaptation? Why does it need that/those adaptation(s)? –food? –camouflage?
10.2 Darwin’s Observations Compare these two tortoises. Note their looks and think about what type of food they would be able to eat.
10.2 Darwin’s Observations Darwin observed differences among island species. –Domed tortoises live in wet areas rich in mosses and short plants –have shorter necks and legs –Saddle-back tortoises that live in areas with tall plants –have long necks and legs
10.2 Darwin’s Observations Darwin found fossils of extinct animals that resemble modern animals. Glyptodon Armadillo Darwin observed fossil and geologic evidence supporting an ancient Earth.
10.2 Darwin’s Observations He saw land move from underwater to above sea level Supported the theory that small daily geologic activity can lead to great changes over time Darwin extended his observations to the evolution of organisms. Darwin observed an Earthquake Darwin found fossil shells high up in the Andes mountains.
Variation 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
Grizzly Bear Polar Bear Killer Whale Blue Whale vs. Interspecific variation: is variation among individuals of different species Interspecific Variation