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LEQ: What is the relationship between adaptation and natural selection?

LEQ: What is the relationship between adaptation and natural selection?. Assignment: Reading 1.1-1.3 Focus on: characteristics of life, themes of biology, hypotheses Activator:..entangled bank..

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LEQ: What is the relationship between adaptation and natural selection?

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  1. LEQ: What is the relationship between adaptation and natural selection? Assignment: Reading 1.1-1.3 Focus on: characteristics of life, themes of biology, hypotheses Activator:..entangled bank.. React to the following quote from Charles Darwin’s book On the Origin of Species. What are your views on the evolution of life? Key terms: evolution, adaptation

  2. Evolution is change in living things over time. • Change: • genetic information • anatomy • development • Compare and contrast white oak (left) and red oak leaves (right)

  3. Evolution can occur through natural selection • Natural selection • advantageous traits • survival • reproductive success • Q: What environmental conditions favor the growth of evergreens more than deciduous trees?

  4. Adaptation involves changes in the traits of species • Top: coastal live oak • Close relative of red oaks • Bottom: southern live oak • Close relative of white oaks • Evergreen: adapting to poorer growing conditions • dryness • salt • sandy soils

  5. New species can emerge when adaptive traits are passed on to future generations • Q: What are the characteristics of a tree?

  6. Adaptation: “racing for the sky” on islands • Prickly pear cactuses have evolved tree forms on the Galapagos Islands

  7. Adaptation: “racing for the sky” on islands • Cucumber plant relatives have evolved a tree form on Socotra

  8. Summary: • What is the relationship between evolution and natural selection? • Speculate: • Why have so many different types of tall woody plants evolved? • Why have so many different types of evergreens evolved?

  9. Summary: • How is the structure of a system (bone) related to how it functions? • Reflection: “No organ is an island” ~ Gerard Karsenty. In what way or for what reason would a bone need to be attuned to the rest of the body? • Closing: Describe how our class could be considered a system.

  10. Purple praying mantis: note the petal-like anatomy

  11. Orchids & predators

  12. Spiny Flower Mantis

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