BIO120H1 Chapter 4: COYNE CH4
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BIO120H1 Full Course Notes
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Document Summary
Evolution explains the distribution of life across the earth. Oceanic islands tend to have unbalanced and odd fauna and flora. Darwin: distribution of species = after dispersal, evolution of new species + shifting earth. Creationist cannot explain why different types of animals have similar forms in different places. Convergent evolution demonstrates: 1) common ancestry 2) speciation 3) Also continental driftglossopterisbiology indicates cold climate plant but found in warm weather. Seed cannot migrate because heavy:: actually due to continents moving (including trees themselves). Continental islands-once connected to continents; oceanic islands never connectedfrom volcanoes or coral reefs. Oceanic islands lack native species found in many continents and continental islands. Most oceanic islands lack the same missing groups, but have their own endemic organism. When humans introduce species to oceanic islands, they tend to do well and destroy. One group is overrepresented, with species filling niches occupied by very different species on continents or continental islands.
