BIO 141 1st Edition Lecture 20 Outline of Last Lecture II. Biodiversity ImportanceIII. Community InteractionsIV. Human EvolutionOutline of Current Lecture V. BipedalismVI. Environmental ChangesVII. Evolution of ManCurrent LectureBipedalism- Fossil distributions: hominids only near Africa Environmental Change- Lead to dry savannaso Leads to less hair- Lead to standing up, which means free handso Easier to see farther away, so it’s easier to hunt and not be hunted as easy- Bipedalism paved the way for larger braino Babies born smaller due to pelviso Longer care of infants – more culture, have to work with more people- Hands free to create and use toolsHomo habilis: Handy man- First tool-maker- Brain size: 47% size of oursTool Use and Big Brains- Our brains use about 1/5 of our daily energy- High protein and high fat diet is necessaryHomo erectusThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- 71% brain use- Colonized Asia and EuropeNeanderthals- 500,00 – 30,000 years ago- Brain size is 12% larger than oursHomo sapiens sapiens (us)- 200,000 years ago- Share 1-4% DNA with Neanderthals- Started drawing on walls about 80,000 years agoWhy expect there to be more genetic diversity amongst different groups of African people?- Bigger than Europe and U.S. put together- Truly massive area- Has more diversity in homo sapiens than everywhere else combined- When groups left Africa they took their genetics with them so everywhere else has a smaller gene poolHumans are a young species- There are 3 times as much genetic diversity between 2 emperor penguins as between 2 humans- They are an older species than we are- We almost got wiped out, really harsh conditions created us, the ones that were smart enough were the ones to
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