Lecture-1-Themes-in-_42852 - theproductsof>;changethat i

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• The biological world and all of its inherent features are the products of >3 billion years of change; change that: – has resulted in a multitude of adaptations – is present at the molecular level through to the organismal level li th ti i ti d b ll l ti f i – relies on the genetic variation possessed by all populations of species – is preserved and passed on to future generations myoglobin hemoglobin
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Chimpus imbecilus Apes stupidus Neanderslob The Dawn of Homer Monkious eatalotis Homersapien The process of understanding biology begins with curiosity & inquiry – answers come from a methodical approach of scientific observa tion & experimentation. Understanding the enormity of biology begins by developing a view of life based on a few “big ideas” or themes that permeate all areas of biology: Emergent properties Exchange of Matter & Energy Cells – basic unit of life DNA – molecule of life Form Fits Function Biological systems are regulated The big one Æ Evolution
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• In BIOL 1361 we will be exploring the features and properties of life often from a reductionist viewpoint. – Reductionism: examine the “parts” that make up the complex form in order to understand how it functions. – As the “parts” are put back together, new features emerge that the individual components themselves do not possess. [emergent properties] • The reductionist approach reveals the scope of biology as it is organized into different levels: – Largest (biosphere, i.e., Earth) to smallest (atoms) – The dividing line between life & non life: the level of the cell emergent properties ; depends upon arrangements & interaction of components at each level.
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Levels of Biological Organization The biosphere Ecosystem: (All living + non living components in a specific area) Communities (all living species in a Forest specific area) Populations (all members of a species Organisms (individuals) in an area) Maple trees Single maple tree
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O & Cells* Levels of Biological Organization (continued) Organs & organ systems ( 2 or more tissues ) Cells Cell Organelle (molecules 10 μm arranged to form a functional component) 1 Leaf of a maple tree Chloroplast Atoms Tissues (group of similar cells) 1 μm 50 μm Chlorophyll molecule Molecules (combinations of atoms) What is the lowest level at which photosynthesis will occur?
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Outer membrane Systems Biology • A systems biology approach and cell surface Cytoplasm Nucleus A systems biology approach examines the features of a whole system through the f d l use of models.
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