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INDEP. Day 15. How can species have similar physical features without being closely related?. Time is now up for the Do Now!. One. F ive. Two. Three. Four. minute(s) for Do Now. S ix. To answer the question: Explain the relationship between the environment and analogous characters.

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S ix

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  1. INDEP Day 15. How can species have similar physical features without being closely related? Time is now up for the Do Now! One Five Two Three Four minute(s) for Do Now Six • To answer the question: • Explain the relationship between the environment and analogous characters • Vocab for today: • Analogous characters • Convergent evolution @MrLinehan HW or study questions?

  2. WHOLE Agenda • WHOLE: Review of Do Now • COOP: Tower building • WHOLE: Guided notes • WHOLE: Essay analysis • INDEP: Essay practice • COOP: Grading essays • ASSESS: Exit quiz • Check-out

  3. WHOLE The Do Now.Let’s review.

  4. WHOLE Your challenge: build a tower • As a group, build the tallest freestanding tower possible • Freestanding – cannot rely on anything else for support • Movement: do not leave your element team’s table • You have fifteen minutes

  5. WHOLE Getting supplies… When I say go... • The tallest member of your group will come and get: • 1 newspaper • 1 meter of masking tape • A scoring rubric for you to turn in

  6. COOP Your challenge: build a tower • As a group, build the tallest freestanding tower possible • Freestanding – cannot rely on anything else for support • Movement: do not leave your element team’s table • You have fifteen minutes

  7. WHOLE And… time!Let’s talk about those towers.

  8. WHOLE A problem… • Based on their physical features, what pairs belong together on a cladogram? • What pairs actually have the more recent common ancestors?

  9. WHOLE The fix Analogous characters are physical characters that evolve through convergent evolution*. * for definition, see D8 notes

  10. WHOLE The fix Convergent evolution means that two distantly related species face similar competitive pressures and adapt by developing structures that perform the same function.

  11. WHOLE The fix Analogous features are different from homologous structures because they perform the same function and are not evidence of a shared ancestor. Therefore, the structure of analogous characters may be different.

  12. WHOLE Wait – what was that?! Analogous structure Different structure, same function, not from common ancestor, convergent evolution Homologous structure Same structure, different function, evidence of common ancestor, divergent evolution

  13. WHOLE Understanding rubrics Explain how cladograms show phylogeny. • You would receive one point for each of the following: • Including (1) an introduction with your claim, (2) evidence/justification, (3) a conclusion that (4) explains why the topic is important or relevant • Definition of cladogram • Definition of phylogeny • Explanation of specific information cladograms provide • Description of an example Cladograms are graphic organizers that show phylogeny, or evolutionary history. Cladograms show many species branching off over time and organize species based on their ancestral and derived characters. So a cladogram might have birds branching off after four limbs but before hair or fur. Because they do this, cladograms are imporant.

  14. WHOLE An exemplar response Explain how cladograms show phylogeny. • You would receive one point for each of the following: • Including (1) an introduction with your claim, (2) evidence/justification, (3) a conclusion that (4) explains why the topic is important or relevant • Definition of cladogram • Definition of phylogeny • Explanation of specific information cladograms provide • Description of an example Cladograms are graphic organizers that show phylogeny, or evolutionary history. Cladograms provide a hypothesis about how species evolved from a common ancestor over time by studying what features they share, which we call ancestral characters. As you move up a cladogram, or forward in time, you see more species branch off. When a species develops new characters that others do not, we call this a derived character. Because the cladograms tells us about how different traits may have evolved over time, they can tell us how closely species are evolutionarily related, which is an important theme in this unit.

  15. INDEP WHOLE Essay practice When I say go... • Complete the essay on your practice sheet based on today’s guided notes • Use the rubric to guide your writing! • You have ten minutes

  16. COOP WHOLE Correct your neighbor’s essay When I say go... • Trade essays with a neighbor • If in a group of three, trade to your right! • Read the essay and check the points on the rubric! • Give them a final score out of five • You have four minutes

  17. ASSESS Exit quiz • Answer multiple choice on clickers using the student code in your binder. • ASSESSexpectations will apply • Anytalking or materials on the desk will result in a 0. • It must be silent until every person has turned in the test.

  18. INDEP Track your score Record your screen in the “score one” column of the secondrow of your unit 2 cover sheet

  19. WHOLE Exit procedures • Line up in back • Chairs pushed in (A3 & B7 - on tables) • Area cleaned up • Nothing left in the room! • Get today’s participation score, MissionBucks, and afternoon passes from Mr. Linehan

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