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DO Now 12/6

DO Now 12/6. What is biogeography and how does it differ from the fossil record?. Fun Fact Friday. Peppermints not only give you fresh breath after meals but also aid in digestion.

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DO Now 12/6

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  1. DO Now 12/6 • What is biogeography and how does it differ from the fossil record?

  2. Fun Fact Friday • Peppermints not only give you fresh breath after meals but also aid in digestion. • Diamonds are in fact not rare or valuable - one company called De Beers restricts the diamond supply, keeping prices high. • In 1980 a 2.5 GB disk drive was the size of a refrigerator, weighed 550 pounds and cost $40,000. • Basketball was invented in Canada. • A group of sharks is called a shiver.

  3. Homologies • Homologies are likenesses between something • Inherited from a common ancestor • In the case of evolution, we look at 3 different types of homologies • Anatomical • Developmental • Genetic

  4. Anatomical Homologies • A structure that is anatomically similar among a group, although it might not have the same function (i.e. used for walking, flying, climbing, etc.) • Most common comparison is among the forearms of different animals

  5. Developmental Homologies • Embryonic similarities among organisms of different species • All vertebrates have a distinct developmental pattern • Some common characteristics • Notochord • Postanal Tail • Pharyngeal pouches • Dorsal Hollow Nerve Cord

  6. Genetic Homologies • DNA/RNA similarities among organisms • Scientists look at the genetic code of an organism and compare it to that of another organism • Also looks at amino acid chains – Why?

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