Presentation on theme: "SPONGE Look back in your notes from Thursday. Please write a paragraph describing what Darwin learned from the animals that he observed on his voyage."— Presentation transcript:
1 SPONGELook back in your notes from Thursday. Please write a paragraph describing what Darwin learned from the animals that he observed on his voyage. (Think adaptations and variations)What are adaptations?Is a physical difference in ONE individual in a group an adaptation or a variation?
2 OBJECTIVEToday we will create a double bubble map comparing and contrasting the homologous structures of a bird vs. a whale.
3 Set up Cornell Notes on pg. 19 Topic: 10.4 Theory of Evidence of EvolutionEssential Question:How can a bat’s wing be considered a homologous structure AND an analogous structure?10.4 Evidence of Evolution2.1 Atoms, Ions, and MoleculesHow can a bat’s wing be considered a homologous structure AND an analogous structure?
4 Why is this important?Understanding that structural patterns are clues to the history of a species is important because some of Darwin’s best evidence for evolution came from comparing the body parts of different species.
5 8.d- Students know reproductive or STANDARDS8.d- Students know reproductive orgeographic isolation affects speciation7.3c- Students know how independent lines of evidence from geology, fossils, and comparative anatomy provide the bases for the theory of evolution
6 KEY CONCEPT Evidence of common ancestry among species comes from many sources.
7 Evidence of Evolution: 1. Fossils- are the preserved remains of animals, plants, and other organisms from the past.
8 Fossils in older layers are more primitive (simple) than those in the upper layers Evidence for change over timeThe fossil record supports Darwin’s concept of Decent with modification
9 Specific conditions are needed for fossilization. Only a tiny percentage of living things became fossils.
10 Relative dating estimates the time during which an organism lived. It compares the placement of fossils in layers of rock.Scientists infer the order in which species existed.
11 Fossil evidence of evolution of Hominid Skull The term "hominid" may refer to "humans and relatives of humans closer than chimpanzees".In this usage, all hominid species other than Homo sapiens are extinct
12 2. Geography:Darwin saw that island finches looked like, but were not identical to, species on the S. American ContinentDifferent ecosystems, favored different traits
26 Points to PonderCompare these wings.They are both used to _______Are the structures the same?
27 Points to PonderSuppose two organisms have similar needs caused by the environment, for example two different organisms needing to fly…Both can develop similar adaptations using different body parts (analogous structures)
28 Analogous structures have a similar function, but are NOT similar in origin Analogous structures are NOT evidence of a common ancestor!!!!!!
29 **Identify each animals’ anatomical structure vs. function
30 ChitinBone and SkinChitinBone and feathers**Identify each animals’ anatomical structure vs. functionAll function the same way (they are all used for flying), but their structures are different
31 Evidence for evolution in Darwin’s time came from several sources SPONGEPlease open your study guides to page 105 and complete it.For those of you who forgot it….Geography:Fossils:Give examples of eachEvidence for evolution in Darwin’s time came from several sourcesAnatomy:Embryology: