Evolution and Natural Selection Essential Question: How does natural selection cause evolution within a population? Think about it: Which of these will most likely result in variation within a species? 1. mutation 2. succession 3. diffusion 4. competition

VariationAdaptationNatural SelectionEvolution Variation an individual that possesses characteristics different from the others Adaptation the evolutionary process where a population becomes better suited to its habitat Which colored bug was better suited to live on the bark of a tree? How does variation in bug color lead to adaptation?

VariationAdaptationNatural SelectionEvolution Natural Selection organisms best adapted to their environment survive and reproduce Evolution is change in traits of a population over successful generations Why is the brown bug more numerous based on Natural Selection? How long does it take for a population to evolve?

Evolution via Natural Selection Charles Darwin came up with the Theory of Natural Selection Natural Selection organisms best adapted to their environment survive and reproduce Therefore a giraffe with a short neck would die and the long neck giraffe live… producing long neck offspring

Evolution via Theory of Acquired Characteristics Jean Baptiste Lamarck came up with the Theory of Acquired Characteristics Acquired Characteristics are traits that change during the life of an organism (not inherited). Therefore a giraffe with a short neck would stretch its neck to get the leaves

Pollenpeeper’s Evolution Darwinian Evo vs. Lamarckian Evo Go to http://www.pbs.org/wgbh/evolution/darwin/origin/index.html Click “Explore what Darwin called “the mystery or mysteries” Read and Answer the following questions 1-3 on wkst Click: “Explore the pollenpeepers’ new homes” Chose an island: Windsor / Norcross / Warwick Archipelago Click “Detail View” The instruction tab along the top will help you navigate on the page.

Pollenpeeper’s Evolution Darwinian Evo vs. Lamarckian Evo Example scenarios: Darwin’s Natural Selection Lamarck’s Acquired Characteristics Final Project: With your partner, write a similar pair of scenarios describing how a particular species of pollenpeeper bird evolved from the ancestral species. One scenario will be based on Charles Darwin’s Theory of Evolution by Natural Selection The second scenario will be based on Jean Baptiste Lamarck’s Theory of Acquired Characteristics. 1) How they adapted 2) When they adapted ^^ (how long did it take) 3) New feature that they have based on Darwin’s theory (explain how they got from the classic to the new adapted bird) ^^(include food/habitat/ competition/predators in explanation) Island: Windsor Island 1) How they adapted 2) When they adapted ^^ (how long did it take) 3) New feature that they have based on Lamarck’s theory (explain how they got from the classic to the new adapted bird) ^^(include food/habitat/ competition/predators in explanation) 5mya (Classic pollenpeeper) Present (N. Mainland pollenpeeper)