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Chapter 24 Main Ideas

The Origin of Species. Chapter 24 Main Ideas. Speciation. Microevolution vs. macroevolution Biological species concept. Reproductive Barriers. Pre-mating: Habitat isolation Temporal isolation Behavioral isolation Post mating, pre-fertilization: Mechanical isolation Gametic isolation

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Chapter 24 Main Ideas

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  1. The Origin of Species Chapter 24 Main Ideas

  2. Speciation • Microevolution vs. macroevolution • Biological species concept

  3. Reproductive Barriers • Pre-mating: • Habitat isolation • Temporal isolation • Behavioral isolation • Post mating, pre-fertilization: • Mechanical isolation • Gametic isolation • Post fertilization: • Reduced hybrid viability • Reduced hybrid fertility • Hybrid breakdown

  4. Modes of Speciation • Allopatric speciation • Sympatric speciation • Polyploidy in plants • Habitat differentiation • Sexual selection • Adaptive radiation

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