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EVOLUTION

EVOLUTION. Change in populations over time. 108. Genetics Notebook Check 109. Genetics Unit Test 110. Evolution Coach Notes (Lessons 20 and 21) 111.Types of Evolution 112. Evidence Evolution Occurred. # 110 Evolution coach notes.

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EVOLUTION

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  1. EVOLUTION Change in populations over time

  2. 108. Genetics Notebook Check 109. Genetics Unit Test 110. Evolution Coach Notes (Lessons 20 and 21) 111.Types of Evolution 112. Evidence Evolution Occurred

  3. # 110 Evolution coach notes • Complete Lessons 20 and 21 in Coach according to the assignment guidelines below. • Take notes on each main idea in outline. • Define listed vocabulary words. • Write q&a for four questions at the end of each less.

  4. Types of evolution #111 • Divergent evolution : one species splits into two or more that become less alike as they evolve. • Convergent evolution: two dissimilar species come to look like each other. • Co-evolution: Two species evolve together, so that they eventually come to benefit each other (also called parallel evolution)

  5. Evidence Evolution Occurred #112 • Fossils: traces of past life found in sedimentary rock • Relative dating: lowest layer of rock = oldest fossils • Absolute dating: uses radioactive isotopes, determine half-life • C-14’s half life = 5730 years • If 25% of C-14 is left in rock… • ½ 100% = 50% • ½ 50% = 25% • 2 half-lives gone by (5730 X 2 = 11,460 years) • Comparing Anatomy of different organisms • Homologous structures: similar (= related)

  6. All similar in structure!! NOT similar!

  7. Analogous structures: different (= NOT related) • bird vs. insect wings • Vestigial structures: no current purpose anymore • Examples: appendix, tailbone, wisdom teeth, muscles that move ear bones 3. Embryology: compare stages of development 4. Comparing biochemicals(DNA, proteins) of different organisms • APE: TTA CCG GGA GTT AAA • SNAKE: CTA GCA GGA CCC GTC • HUMAN: TTA CCG GGA GCC AAA

  8. What type of evolutionary evidence are these showing?

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