BIOL10004 Lecture Notes - Lecture 1: Relative Dating, Cambrian Explosion, Comparative Anatomy

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28 Aug 2018
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Evolution- the change, over time, in the genetic composition of populations. Evolution theory: earth has a long history, all living organisms arose in the course of this history from earlier, more primitive forms, as a consequence of this theory, all organisms are related or share a common ancestor. Fitness= measure of the capacity of an organism to survive and to produce viable and fertile offspring. Adaptation= a trait that increases the fitness of an organism in a particular environment. Artificial selection- humans decide which plants or animals should/shouldn"t be reproduced. Origin of life: life formed spontaneously on early earth ( reducing environment facilitated organic molecule formation eg rna polymers, extraterrestrial origin- life from another planet or comet (panspermia) Because all organisms share a common ancestor, there is a **unity of biochemical processes. Eg. all organisms have genetic material, dna- contains the instructions for how that organism will develop. Organisms also have the machinery to carry out the instructions- proteins.

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