ANT 301 Lecture Notes - Lecture 5: Species Problem, Homo Sapiens, Asexual Reproduction
Document Summary
Kingdom, phylum, class, order, family, genus, species (we are homo sapiens) Phylogeny: the evolutionary history of a set of organisms. Lineage is one segment of that (branching diagram) Things that branch off more closely together means that the species are more closely related to each other. Species: group of (potentially) interbreeding organisms that are reproductively isolated from other such groups of organisms. Reproductively isolated means that genes are not being exchanged. Over time they will become genetically different from one another. (an idea of how speciation occurs) If you have two population that are geographically separated, they still have the potential to mate. Challenges to the bsc: asexually reproducing organisms, operational identi cation of species, hybridization. Some physical barrier that separates two populations (a river between two pieces of land) Peripatric- have some barrier, but one population that gets separated is very dissimilar to the original population. Sympatric- the two different organisms are in the same place.
