BIO152H5 Lecture Notes - Lecture 1: Reductionism, Dependent And Independent Variables, Statistical Hypothesis Testing
Document Summary
Theme: new properties emerge at each level of biology and is organized into levels. Reductionism: the approach of study where you reduce the complex systems to simpler components. Classifying the diversity life: different approaches (a) a two-kingdom system- linnaeus (b) a ve-kingdom system-whittaker (c) a six-kingdom system-woese (d) a three-domain system-woese. How do we classify organisms based on many lines of evidence: behaviour, comparative anatomy, chromosome structure, developmental stages, molecular traits amino acid sequencing (dna sequencing) Why do we look want to look at embryos and not just adults: have more traits than adults. Developing evolutionary classi cations: reconstructing evolutionary history (snakes and where they come from, having ancestors that previously had legs) Science: seeks natural causes for natural phenomenon. Darwin: earth is very old, organisms have been change throughout the history of life, species multiply by splitting into daughter species, evolution proceeds via gradual changes in populations. The scienti c process can be divided into several stages:
