Tag: isolation
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Speciation on Daphne Major – Big Birds Get No Love
The beaks of finches on the island changed in size after a catastrophic draught. Students analyze graphs and explore how natural selection affects populations.
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Speciation Modes – Reinforcement
Students distinguish between allopatric and sympatric speciation and then identify what types of isolating mechanisms are described in scenarios.
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How Can Changes in a Population Lead to New Species?
This lesson explores the two models of speciation: allopatric and sympatric. You can also assign a simple print version that explores speciation modes. Students first read about allopatric speciation and apply it to the finches on the Galapagos islands. Each finch species became isolated on its own island, which resulted in each island having a…