BIO 1300 Lecture Notes - Lecture 2: Homo Sapiens, Hominidae, Order Of Friars Minor Capuchin
12 Feb 2018
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Document Summary
An analogy of a 12-hour clock representing the history of the earth over 5 billion years. Big time period where first forms of life had evolved and they dominated for the first massive sliver of time. Half of the clock there was still not an emergence of a single cell eukaryote. Emergence of life for 2 billion years was single-celled organisms. 4 billion years ago is the origin of life. Mesozoic middle animals dominated by dinosaurs. A population or group of populations that are capable of interbreeding and that can produce viable and fertile offspring. 2 conditions: interbreed and create fertile offspring. Possibility of interbreeding without giving rise to a viable fertile offspring: mule. Mules are a hybrid and they are strong: female horse and male donkey. Mule is not its own species because they can"t interbreed. Horse has a 2n=64 and a donkey has a 2n=62 and therefore mules are infertile.
