Transcript Warm Up
Warm Up p. 32-33 of IN • Look at the three fossils on page 10B 1) How are the fossils in the photographs similar 2) How are they different? Explain. Homework: teaching w/visuals w/s Tape to page 42 of your notebook Table of Contents Date Session # 10/11-12 17 Activity Page # Review questions, EQ 36 Vocab 3 quiz, A Trip Through Geologic Time 37 10/13-14 18 Chapter 2A Test 36 10/17-18 19 Hidden Organism 38 Geologic Time and Evolution History 39 Can U Survive 40 Darwin’s 4 Principles Flow Map 41 Essential Question How do physical characteristics of organisms demonstrate/support the theory of evolution? Hidden Organism p. 38 • You will have 1 minute to search the room for an organism that “lives” in the classroom. • Your are this organism’s predator. • The organism is shaped like this: • When you find it/them, TELL NO ONE! • Return to your seat and describe this activity and the adaptation of this organism on p of your notebook. Describe any other organisms you can think of with this type of adaptation. Flow Map shows sequencing, order Geologic Time Scale records the evolution of life p. 39 Unicellular organisms (1 cell) bacteria Multicellular organisms (2 or more cells) Simple plants ferns algae fish amphibians Flowering plants reptiles mammals Major geological events impact the evolution of living things Mass Extinction: when a large # of species die out suddenly 2 Major ones: 1) Permian – 250 mya (end of Paleozoic era). 90% ocean life died out 2) Cretacious – 65 mya (end of Mesozoic era). Extinction of dinosaurs Evolution: process thru which species change over time, due to a change in genetic material that is passed thru generations. Two scientists with competing theories of evolution LAMARK •French •Animals acquired traits during their lifetime and passed them on to offspring •Lamark was wrong!! •Ex. Giraffes DARWIN •British •Natural Selection: members of a species that are best suited to environment will survive and reproduce •4 principles to support •Ex: Galapagos Isles Finch beaks Darwin’s 4 Principles of Evolution Overproduction When plant or animal reproduces, it makes more offspring than actually survive and reproduce Ex Overproduction Variation •There are naturally occurring differences in traits due to different genetic material or due to mutations •Variations get passed on to offspring Ex Darwin’s 4 Principles of Evolution Overproduction Variation Adaptation • Inherited trait that gives an organism an advantage in its environment over other members of the species Ex Darwin’s 4 Principles of Evolution Overproduction Variation Adaptation Selection •Organisms with an adaptation will survive to reproduce and pass on the adaptation “Survival of the Fittest” Ex “SPECIATION IS DUE TO ISOLATION” Or “ISOLATION CAUSES SPECIATION” Isolation 2 populations of the same species are separated They can’t reproduce with each other Different mutations occur in each population Speciation evolution of a new species from an old one due to environmental changes. Kaibab squirrel (left) and Albert’s squirrel (right). Can you survive? p. 40 1. Write an analysis of this activity which answers the following: – what traits are important to the survival of this species of organism? – What adaptations would best help it to survive? – What would happen if the environment changed? 2. Sketch an organism with these traits (this organism can be a plant or animal)