BIO 3503 Lecture Notes - Lecture 5: Divergent Evolution, Convergent Evolution
1 Feb 2017
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Document Summary
Peppered moths in the uk during the industrial period. Tree trunks became blackened due to factory smoke. The black peppered moths survived more, because they could camouflage better on the blackened tree trunks. The white peppered moths died more often since they could not hide from predators on the tree trunks. We now have a mix of both types of moths. Seasonal: for example, different coloration between young and adults for example, different feathering in summer than winter. In winter, must camouflage in snow, in summer, must camouflage in grass or dirt. Geographic: large dispersion of species, different environments in different locations, males compete for female attention, therefore, for example, some male birds need different adaptations are required. Dynamic polymorphism: the morphs have an advantage, depending on their frequency there are fluctuations through time, often. Differences in morphes are between males and females.
