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Transcript of Evolution
1. How do we know organisms have evolved?
2. Why do organisms evolve?
3. How do organisms evolve?
4. Why do some organisms go extinct and others survive? Fossils show us structures have changed. Remember the whale example from the LiveBinder??? Arctic Fossils Mark Move to Land Article kingdom do mushrooms, mold and mildew belong to?
What domain do we belong to?
Which kingdom has both aWhatutotrophs and heterotrophs?
Which kingdom is the largest?
Which domain has the oldest organisms?
Which domain does strep belong to?
Which kingdom is made up of only autotrophs?
Which kingdom has organisms in the most extreme environments?
Which domain is made up of organisms that have a nucleus?
Which is the species name in the following: Ursus arctos? We are going to review the "Find Someone Who Knows" from Friday. This time, I want you to really move around the room and discuss the answers.
DO NOT ASK ME Create a Flip Chart to write your information for this area of study.
Fold four sheets of paper as shown.
Label the flaps
How do we know organisms have evolved?
Analogous Structures Homologous Structures
similar structure not necessarily same function ex. Human hand, whale flipper, bat wing 8.L.4.1 Summarize the use of evidence drawn from geology, fossils, and comparative anatomy to form the basis for biological classification systems and the theory of evolution. life on Earth, as well as the shape of Earth's surface, has a history of change that is called Evolution The evidence that things and the Earth changes over time is scientifically described using... Theory of Evolution Plate Tectonics Law of Superposition Evolution: the process of change over time Biological evolution describes the diversity of species through gradual ways over many generations. Orchids adapt by having a shallow root base on a tree to get water and broad leaves to catch sunlight. Species get their unique characteristics through biological adaptations. This shows how some species are different in the same population. some trees grow taller than the one beside it The World of Plants: Plant Adaptations Let's Review Fossils... Fossils: preserved remains or traces of organisms that lived in the past Scientists use fossils to compare one another... and to living things... to see similarities and differences. Fossils are found in sedimentary rock. The layers given evidence for Earth's long history.
Therefore, the fossils within these layers must be old too. Sediment = sand and small pieces of Earth Sediment is slowly buried and cemented together to make new rock layers. Fossils are created here. Rock layers near the top will have fossils looking like existing species. Why? further down the layers of rock = older the fossils This provides evidence to the history of Earth itself..... but also of changes in organisms whose fossils are found in these rock layers. Fossil Record: collecting fossils and placing them in chronological order Fossil Record shows..... existence of diversity extinction change of many life forms Conditions to make a fossil have to be very specific. Not all species from the past have fossils we can find. Scientists look at similarities and differences between living organisms today and in the fossil record to reconstruct history and infer lines of evolutionary descent. Adaptations How Stuff Works: Evolution Adaptation
http://videos.howstuffworks.com/discovery/28764-assignment-discovery-evolution-adaptation-video.htm Examples of Adaptations
Mimicry: imitating something else;
imitating other animals; eye spots
Camouflage: blending in with the environment