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Indietro

Chapter 22: The Origin of Species – From Speciation to Macroevolution

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Introduction to Speciation

  • Introduction to Speciation
    03:03

The Biological Species Concept

  • The Biological Species Concept Example 3
    02:15
  • Prezygotic Barriers
    05:18
  • The Biological Species Concept Example 1
    01:27

Allopatric and Sympatric Speciation

  • Allopatric and Sympatric Speciation
    02:46
  • Allopatric and Sympatric Speciation Example 1
    04:25
  • Allopatric Speciation
    03:53

Hybrid Zones

  • Hybrid Zones Example 1
    02:37
  • Hybrid Zones
    04:38

Speciation Time Scales

  • Gradual Evolution vs. Punctuated Equilibrium
    03:23

Origin of Life

  • Origin of Life Example 1
    03:23
  • Events that Lead to the Formation of Cells
    06:38

Natural Selection and Evolution

  • Natural Selection Causes Adaptation
    07:48
  • Adaptation Improves Fitness
    02:57
  • Evolution can Occur Via Natural Selection
    04:32