BIOB51H3 Lecture Notes - Lecture 2: Special Creation, Allele Frequency, Phylogenetic Tree
2 Feb 2018
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Big questions in biology: adaptation: is the good fit of organisms to the environment. Alfred r wallace: he wondered why organisms still adapt to the environments if all the organisms were created at one time, but the environment has changed since then. Before darwin: historical special creation was then considered as not a good representation for life, diversity, and adaptation. Evolution: the development of new types of living organisms from pre-existing types: this was a very early definition. Diversity of life: mammals all have similarities when compared to birds, etc. Problems with lamarck"s mechanism: the clusters/patterns of similarities suggested that the organisms are related, we can best represent the similarities in a phylogenetic tree. Darwinian fitness: is the ability of individuals to survive and reproduce relative to others in the same population in their environment. Relative: lifetime reproductive success or expected reproductive success.
