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Biology LibreTexts

3: Macroevolution

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  • 3.1: Formation of New Species
    Although all life on earth shares various genetic similarities, only certain organisms combine genetic information by sexual reproduction and have offspring that can then successfully reproduce. Scientists call such organisms members of the same biological species.
  • 3.2: Geologic Eras
    Evolutionary changes coincide with geologic changes on the earth. But consider that changes in geology (e.g., mountain formation or lowering of the sea level) cause changes in climate, and together these alter the habitats available for life. Two types of geologic change seem to have had especially dramatic effects on life: continental drift and the impact of asteroids
  • 3.3: Mass Extinctions


3: Macroevolution is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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