Biology 1001A Lecture Notes - Lecture 21: Species, Allopatric Speciation, Zygote
7 Dec 2016
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Cycle 10: lecture 21 - species concept and speciation. Forest elephants and savannah elephants - debate for decades whether forest elephants were distinct enough from savannah elephants to be their own species and merit conservation protection: they are suf ciently different. Different social groups (more solitary, smaller groups) Sometimes black bears have offspring with white fur: the bene t to considering these white furred bears a separate species would be additional conservation measures put in place to protect them. Ex. male and female ducks look different but are the same species. Tree coopers (little brown birds) look the same but the 2 populations sing different songs and don"t interbreed (isolated gene pools) Female ligers can sometimes be fertile: horses and donkeys can mate to produce sterile mules, cant be used for asexual or extinct organisms. Not each others closest relative (not a monophyletic clade)
