Lec_2_F06_st

Lec_2_F06_st - 1 Observations Biodiversity • For early scientists there were many questions about the natural world • From very early on there

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Unformatted text preview: 1 Observations Biodiversity • For early scientists there were many questions about the natural world • From very early on there were depictions of animals, and stories about how those animals influenced others • At the level of biodiversity there was an effort to name every living thing 2 History • Aristotle • Bauhin(s) (1510-1620) • Ray (1627-1705) • Linnaeus (1707-1778) – Binomial System of Nomenclature – Each species is given its own unique name Hierarchy of naming organisms Inclusive Exclusive 3 A matter of perspective Understanding how scientists ask questions and the reasons for those questions Looking a little bit closer 4 Why does perspective matter? Do you see the same thing that the person next to you sees? Kermode Bears Spirit Bears of the Great Bear Rainforest 5 Color morphs in black bears • Single aa replacement in the MC1-R gene. • This is part of a G- coupled protein receptor • 7 pass structure through the membrane. • Conformational change in the protein causes a change at the C-terminus, and a change in the binding site where GDP is replaced with GTP • The result is a lack of deposition of color This is a photo of…? 6 The Frog Experiment Was water pollution causing this? What to do with a hypothesis… Test and retest… 7 Comparative Experiments Controlled Experiments Independent variable vs. Dependent variable Manipulated variable vs. Measured response Riberoia requires 3 hosts 8 Power of Science Scientific explanations are important and valid because: hypotheses are testable hypotheses can be rejected by direct observation and experiments Are chiles too hot to disperse?...
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This note was uploaded on 04/24/2008 for the course LS 1 taught by Professor Thomas during the Spring '05 term at UCLA.

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Lec_2_F06_st - 1 Observations Biodiversity • For early scientists there were many questions about the natural world • From very early on there

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