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Systematics Seeking Order Amidst Diversity 1.4 million • That is about how many species there are known on Earth • systematics, sometimes known as taxonomy, is science’s attempt to classify and organize 1.4 million different things • Keeping these things organized helps with things such as museum management, field work, identifying new discoveries, genetics, etc. Common Names • Used on an everyday basis, common names can be confusing due to their inaccuracy • Example, if I say to you, “Irish Moss.” What would you think of? Maybe something like this? Sorry, its this. Yeah, its seaweed. How about a tufted titmouse? Maybe this guy? NOPE!!! Here he is. He’s in your backyard all the time. He likes sunflower seeds. One more. • Dolphin • got that image in your head? Okay, that works…but This is a dolphin too. Mahi mahi anyone? How Organisms are Classified • Systematics is the science of reconstructing phylogeny (evolutionary history) • A key part is taxonomy this is naming organisms and placing them into categories • there are seven major categories, which I think you know: kingdom, phylum, class, order, family, genus, species • and the newer one, domain. This is really just whether an organism is a prokaryote or a eukaryote Taxonomy • Originated with …. • wait for it….. ARISTOTLE what up Carl von Linné • He called himself… • He called himself Carolus Linnaeus • Jerkishnessity aside he did lay the groundwork for the modern classification system Somehow you knew that this is exactly what he would look like. The Linnaean System • Is the one you’re familiar with • A hierarchical arrangement based on resemblance to other organisms • He also introduced the scientific name, composed of genus and species Modern systematics • Uses many features to categorize organisms • anatomy, developmental stages, biochemical similarities, and the fossil record • The relationships are drawn as cladograms or evolutionary trees