Evolution (Origin of Species)

Evolution (Origin of Species)

1. Divided into... (2 categories)

   • Microevolution
     • Which studies...
       • Small-scale evolutionary change at species level with "immediate" impact
         • Results in...
           • New species
             • For example...
               • Hybrids
     • Occurs in response to...
       • Mutations
         • For example...
       • Migration/ gene flow
         • For example...
         • Is similar to...
       • Genetic drift
         • For example...
       • Natural selection
         • For example...
           • Beetles with brown genes escaped predation and survived to reproduce more frequently than beetles with green genes=more brown in next gen.
         • For example...
   • Macroevolution
     • Which studies...
       • Large-scale evolutionary change above the species level and over a very long time
         • Results in...
           • The creation of new species and taxa
             • Which represent...
               • The large-scale or "bigger picture" of life
                 • Represented using...
                   • Cladistics/ a cladogram (the tree of life)
     • Occurs in response to...
       • Adaptive radiation
         • For example...
     • Divided into... (2 types)
       • Divergent Evolution
         • Which observes...
           • Branching of initially similar populations accumulating differences over time
             • As a result of...
               • The need to fill ecological niches
                 • Can be observed...
                   • Physically
                     • Is similar to...
                   • Migration patterns
                   • Etc.
       • Convregent Evolution
         • Which observes...
           • The evolution of similar traits/ characteristics in distantly species
             • As a result of...
               • Having to adapt to similar environments/ ecological niches
                 • Can be observed...
                   • (Usually) In physical form
             • Opposite of...

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