[BIOL 125] - Final Exam Guide - Everything you need to know! (63 pages long)

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29 Mar 2017
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Characters are not equal: some things easily evolve than others or one depends on a factor to evolve. Adaptation: evolve for a reason, later become a selective advantage. These characters help an organism survive and reproduce: evolution does not result in gradual traits over time, it rather changes the proportion of traits in a population. Gradual change: series of change = example: development of eye in mollusks. This eye has similar features to the vertebrate eye; looking at multiple mollusks, may have evolved from a simple form (eye shape differs, may have a lens); clearly shows an existing building process of what is already there. Levels of organization: animals are multicellular organisms who have different levels of organization inside their bodies, (i) cells, (ii) tissues, (iii) organs, (iv) organ systems. Connective tissue (serosa: eumetazoa true animals . Sponges don"t have tissue level development (barely multicellular) thus making them an exemption: constraint on form.

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