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Adaptations

Adaptations

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Adaptations

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  1. Adaptations 1.Camoflauge: ability to blend 2. Mimicry: ability to resemble another

  2. Resistance • The process of natural selection that allows certain organisms to survive against antibiotics which leads to evolution of the species. • Ex - MRSA

  3. Patterns of Evolution • 1. Adaptive Radiation • 2. Coevolution • 3. Convergent Evolution • 4. Rate of Speciation

  4. Adaptive Radiationaka Divergent Evolution • Occurs in a relatively short time when one species gives rise to MANY species due to creation of new habitat or another ecological opportunity

  5. Coevolution • When species evolve in close relationship with other species. • Mutualism – both benefit • Parasitic – one species benefits, other hurt

  6. Convergent Evolution • Unrelated species that evolve similar traits even though they live in different parts of the world.

  7. Rate of Speciation:amount of time it takes for a species to change! • Gradualism : Theory that evolution proceeds in small gradual steps 2. Punctuated Equilibrium: Theory to explain abrupt or sudden changes in fossil record.

  8. Tropism: A plant’s growth response to an external stimulus • 1. Phototropism: • 2. Gravitropism: • 3. Thigmotropism

  9. 1. Phototropism • Response to LIGHT • Plants will grow in the direction of the light source

  10. 2. Gravitropism • Response to GRAVITY • Positive or Negative growth • Positive – Plant growth down towards gravity (roots) • Negative – Plant growth upward (stem/leaves)

  11. 3. Thigmotropism • Plant’s growth response to mechanical stimuli – like contact… • Growth towards the point of contact – (ex. vines)

  12. Behaviors and Natural Selection • 1. Hibernation • 2. Estivation • 3. Migration

  13. Hibernation • Dormancy due to cold weather

  14. Estivation • Dormancy due to hot weather

  15. Migration • Relocate to other area due to weather conditions