BIOL 304 Study Guide - Phylogenetic Tree, Ernst Haeckel, Ancient Greek Philosophy
9 Dec 2014
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J. b. lamarck, 1809: this idea of the great chain of being goes back to ancient greek philosophy, we did not evolve from chimpanzees, we share a common ancestor. Individuals are important in evolution: they may not evolve, but selection operates on individuals, as humans, we are strongly individualized organisms, we can easily think of an individual. Is it always this simple: organisms do not always form discrete individuals, ex: corals, colony animals. form interactions & communicate, each coral is not independent. neither coral nor animal correspond to our view of an individual. 1: even standard organisms consist of cell colonies often capable of division, semi-autonomous units (such as meristems) may be found within a strongly individualized organism. tree growth depends on division in apical meristems. Lineages & evolution: consider phylogeny with a past focal individual, lineage forward in time: individual + all descendants, may be extinct.
