BIO318Y5 Lecture Notes - Lecture 3: Molecular Phylogenetics, Large Blue, Thymus
Document Summary
Mating problems: they actually mate in the north during the spring when there"s also a boom of insects being hatched. Daylight was getting shorter or temperature was dropping: proximate and ultimate hypothesis. Ultimate: how flying south can be related to fitness. Proximate: referring to the mechanisms such as day length, temperature or other mechanisms the bird respond to: ultimate and proximate hypotheses are on different levels and should not be argued against as it could be both right. Animal behaviour on ultimate and proximate questions: proximate and ultimate hypotheses are not alternatives, function and evolution are related to ultimate questions, development and causation are related to proximate questions. Animal evolution: origin of animals almost a billion years ago, at each node, there"s a bifurcation of two lineages, dots represent genetic change, congruence of when it first appeared. Objectives of this set of lectures: talking a lot about social environment.
