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Do Now

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Do Now

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  1. Do Now • What are the steps to gel electrophoresis? • What are the steps to making a transgenic organism? • What are two examples of how we use recombinant DNA technology to make transgenic organisms?

  2. Do Now Do you agree with the following statement? Explain why or why not. Give examples! “Life can only come from other living things.”

  3. Early earth and the origins of life

  4. Abiogenesis The theory that life can come from non-living things Theory of spontaneous generation :up until the 17th century, scientists once thought life came from decaying matter

  5. Disproved by 2 people: Francisco Redi Louis Pasteur Experiment to test whether bacteria (living) spontaneously generated from beef broth (non-living) Experiment to test whether maggots (living) spontaneously generated from meat (non-living)

  6. Disproved by 2 people: Francisco Redi Louis Pasteur Experiment to test whether bacteria (living) spontaneously generated from beef broth (non-living) Experiment to test whether maggots (living) spontaneously generated from meat (non-living)

  7. Redi & Pasteur’s experiments proved the Theory of Biogenesis: Life only comes from living things!

  8. gases energy (amino acids)

  9. What gas is missing?! • Oxygen Anaerobic or aerobic organisms? ANAEROBIC

  10. Miller and Urey Experiment inogranic Early

  11. Sparks/ Lightning Life! (amino acids) atmosphere Ocean

  12. If life has to come from living things, how did life first start?! https://www.youtube.com/watch?v=d4VS00it40o Answer your questions! U6-2

  13. Unicellular prokaryotic anaerobic PHOTOSYNTHESIS! :photosynthetic prokaryotes O2 AEROBIC! :aerobic eukaryotes multicellular eukaryotic aerobic

  14. How did simple prokaryotes go to complex eukaryotes?

  15. Endosymbiotic theory Video http://www.youtube.com/watch?v=RaAM8qQcs6E

  16. Mitochondria Chloroplast

  17. Practice 1: Early Earth Complete pg. U6-3 & U6-4 Making Life Activity Abiogenesis Biogenesis

  18. Abiogenesis Recipe Example Steps: • Put the blanket down • Take out food and tea • Go swing on swings for 30 minutes • Makes ANTS! Ingredients: • Picnic blanket • Sandwiches • Sweet tea

  19. Take out your data trackers and sit and wait for further instruction

  20. Do Now • What is abiogenesis? 2) Who were the two scientists who disproved this theory? 3) What is Biogenesis? 4) Describe early Earth and the first organisms on early Earth. 5) Explain the endosymbiotic theory. In your explanation be sure to describe the first types of organisms and how they evolved.

  21. Do Now • Describe early Earth and the first organisms on early Earth. • Explain the endosymbiotic theory. In your explanation be sure to describe the first types of organisms and how they evolved. • Explain Lamarck’s theory. • What is Darwin’s theory? • What are some key components of the theory of natural selection?

  22. Evolution For each statement, indicate if you Agree or Disagree. Do NOT write the questions: • Organisms change over time • According to evolution, people came from monkeys. • A theory means there is very little evidence to support it • You can either believe in Evolution OR God. • Evolution is something that happened in the past – not now. • There is evidence that supports evolution. • Evolution can explain why some organisms live and others die.

  23. 2 men, 2 theories Lamarck Charles Darwin

  24. Lamarck Theory of acquiredcharacteristics • He said an individual can acquirechangesduring its lifetime and pass them on to their offspring • Example: a body builder with huge muscles would pass on the huge muscles to the baby

  25. Lamarck Long neck and stretching until neck gets longer Keeps stretching neck to reach leaves higher on tree and stretching Short neck Original short-necked ancestor THIS THEORY WAS WRONG!!

  26. 2 men, 2 theories Lamarck Charles Darwin

  27. Charles Darwin Theory of Natural Selection http://www.youtube.com/watch?v=olW9D7TQf3g

  28. Natural Selection variation heritable VARIATION MORE OVER- PRODUCTION compete COMPETITION survive fit NATURAL SELECTION adaptations pass on

  29. Dead giraffe

  30. Darwin • Survival of the fittest: survival of those best adaptedindividuals allows those best adapted traits to be passedon to offspring • Over time, the adaptation is seen in a greater number of individuals in the population because naturehas selectedthe trait to help that organism survive.

  31. Evolution : the theory that species change over time • Species: a group of organisms that can breed and produce fertile offspring • Variation: a difference exhibited by a member of a species • Natural selection: the theory that organisms with favorable traits are more likely to survive, reproduce, and pass on their adaptations to their offspring • Adaptation: a beneficial trait that enables an organism to survive and reproduce

  32. Videos http://www.youtube.com/watch?v=AiTG6T9pTcM http://www.youtube.com/watch?v=Sfgg3S0xnzk

  33. Mutation is a random process but natural selection is not

  34. Practice 2: Natural Selection

  35. Answer Analysis Questions Page U6-6 10 minutes

  36. Peppered Moth Activity http://www.youtube.com/watch?v=LyRA807djLc

  37. Peppered Moths Interactive Activity http://peppermoths.weebly.com/

  38. Do Now • What was Lamarck’stheory called? 2. Define Lamarck’s theory. 3. What is Darwin’stheory called? 4. Define Darwin’s theory.

  39. Do Now Think about our peppered moth lab activity last class… • Which moth color was selected FOR? Explain. (Hint: which moth had the best adaptation) 2. Review question #7 on page U6-6 in your notes packet. What must be present within a population of species in order for natural selection to take place? Explain.

  40. Mutation is a random process but natural selection is not

  41. Do NowThrowback Thursday • What is an autotroph? • What is a heterotroph? • Give an example of each!

  42. Study!! You have a quiz today on early earth, abiogenesis, biogenesis, endosymbiotic theory, and theories of evolution (Lamarck and Darwin).

  43. Fossil evidence 1. Fossil Evidence: Fossilsare the remainsor traces of organisms that once lived. Fossils show us that life went from simple to complex, moved from waterto land, and existed over 3 billionyears ago. • Many found in sedimentaryrock, which is formed from layers of slowly deposited sediments. • Two ways to date fossils: • RelativeDating: dating based on the observation that fossils in the bottom = oldest, top = youngest B. AbsoluteDating: using radioactiveisotopes to determine the exactage of a fossil. http://www.youtube.com/watch?v=GOKW_7KajCU

  44. anatomical comparing anatomical (physical) features between organisms, looking for evolutionary similarities