Phylogenetic Systematics

  title={Phylogenetic Systematics},
  author={Willi Hennig},
Since the advent of the theory of evolutio n, o ne of the tasks of biology has bee n to i nvestigate the phyloge netic relatio nship betwee n species. This task is especially impor ta nt because all of the differe nces which exist betwee n species, whether i n morphology, physiology , or ecology, i n ways of behavior, or even i n geographical distributio n, have evolved , like the species themselves, i n the course of phyloge nesis. The prese nt-day multiplicity of species a nd the structure of… CONTINUE READING
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